Objects – teachanyclass.org

Introduction

Walk into any supermarket in the world. Just inside the door, you will find a row of metal trolleys, each one nested into the next, ready for the next shopper to take. You grab a handle, pull the trolley free, and push it through the aisles. You fill it with bread, milk, vegetables, a packet of biscuits, a bottle of cleaning spray. At the checkout, you empty the trolley into bags. Outside, you push the empty trolley back to the row — or perhaps you leave it in the car park. Either way, somebody will eventually push it back inside. This whole system — the wheeled basket, the wide aisles, the self-service shopping, the trolley return — did not exist before 1937. Until then, you went to small shops and asked a shopkeeper for what you wanted. The shopkeeper got it for you. You carried home what you could in a basket or a bag. The shopping trolley was invented in 1936 and first used in 1937, in Oklahoma City. The man who invented it was called Sylvan Goldman. He owned a chain of supermarkets called Humpty Dumpty. He wanted his customers to buy more, and he realised they could only buy as much as they could carry. With his mechanic Fred Young, he took a folding chair, put wheels on it, and put a basket on top. The first shopping trolley was born. The invention did not catch on immediately. Men thought pushing a trolley looked unmanly. Women thought it looked like pushing a pram. Goldman hired actors to push trolleys around his stores to show people how to use them. Within a few years, the trolley was everywhere. Today, billions of people use one every week. This lesson asks how one small invention shaped a global way of life — and what we can learn from the everyday object you have probably touched in the last few days.

The object

Origin: Invented in 1936-1937 by Sylvan Goldman, the owner of the Humpty Dumpty supermarket chain in Oklahoma City, with the help of a mechanic named Fred Young. The nesting (telescoping) trolley was invented in 1946 by Orla Watson in Kansas City. Both are American inventions.
Period: Used widely from the 1940s in the United States, the 1950s in Britain, and the 1960s and 1970s in most other countries. Now standard equipment in every supermarket in the world.
Made of: A metal wire basket (usually steel, coated with plastic or zinc), a metal frame, four small swivel wheels (usually plastic or rubber), and a plastic handle. A child seat is often fitted at the front. Some modern trolleys have one wheel that locks if the trolley is taken outside the shop's boundary.
Size: A typical shopping trolley is about 100 cm long, 60 cm wide, and 100 cm tall. The basket holds about 100 to 200 litres. The whole trolley weighs about 20 to 25 kg empty. Filled, it can carry up to 100 kg of groceries.
Number of objects: Tens of millions of shopping trolleys are in use worldwide. The North American manufacturer Unarco alone makes about 1 million trolleys a year — and estimates it has made nearly half the trolleys in use today. The largest UK manufacturer is Wanzl, a German company with British factories.
Where it is now: Used in every supermarket in the world. Major design collections include the Smithsonian National Museum of American History (Goldman's original 1937 trolley is on display), the Museum of Brands in London, and the Henry Ford Museum in Michigan. The shopping trolley is widely cited as one of the most important everyday inventions of the 20th century.

Before you teach this — reflect

Questions for you

The shopping trolley is one of those objects so common that nobody really thinks about it. How will you help students see what is interesting about it?
The 'shopping trolley test' (do you return the trolley?) is a famous ethics puzzle online. How will you use it without being preachy?
The trolley enabled the rise of supermarkets, which has had real costs for small shopkeepers. How will you handle this honestly?

Common student difficulties — tick any you have noticed

My students may not know that the shopping trolley was invented in 1937 by Sylvan Goldman, an American supermarket owner in Oklahoma City.
My students may not know that the nesting (telescoping) trolley — the one that fits inside other trolleys — was invented in 1946 by Orla Watson, a separate American inventor.
My students may not know that the shopping trolley made the modern self-service supermarket possible, by letting customers carry more than they could in their hands.
My students may not know that the shopping trolley is also one of the most-discussed objects in everyday ethics ('do you return your trolley?').
My students may not know that some shopping trolleys have wheels that lock if the trolley leaves the store's boundary — to stop theft and abandonment.
My students may not know that countries like Germany use a coin-deposit system (the Aldi system) to make sure trolleys are returned.

Discovery sequence

1

Before 1937, shopping looked very different. In most towns and cities, you went to many small shops — a butcher, a baker, a greengrocer, a dairy. You stood at the counter and told the shopkeeper what you wanted. The shopkeeper went to the back of the shop, fetched the goods, weighed them, wrapped them in paper, and added up the price. You paid, picked up your bag, and went on to the next shop. The whole process could take a whole morning. In the 1910s and 1920s, a new kind of shop began to appear in the United States. It was called a 'supermarket' or a 'self-service store'. The customer walked around the shop, picked up what they wanted, and paid at a checkout at the door. The shopkeeper did not have to fetch anything. This saved money on staff, which meant the shop could sell goods more cheaply. By the 1930s, supermarkets were spreading across the United States. But there was a problem. Customers could only buy as much as they could carry. Most shops gave out small wire baskets. When the basket was full, the customer had to stop. Sylvan Goldman, who owned a supermarket chain called Humpty Dumpty in Oklahoma City, noticed this. His customers stopped shopping when their baskets got heavy. He realised that if customers could carry more, they would buy more. Why might a small problem in one supermarket lead to a global invention?

Points to consider (for the teacher)

Because the problem was not just in one supermarket. Every self-service shop in the world had it. Goldman's invention solved the problem in one place, but as soon as it was known, every other supermarket wanted one. Goldman was lucky — the supermarket model was just spreading in the 1930s, so the world was ready for his trolley. Many inventions are like this. They solve a small problem that turns out to be a big problem in disguise. The wheel, the printing press, the paper clip, the safety pin, the QR code — all started as small fixes to specific situations. The shopping trolley belongs in this family. Students should see that 'good problems' are sometimes more important than 'good ideas'. Once you see a problem clearly, the solution often follows. Goldman saw a small problem in his store and gave the world a new way to shop.

2

The first trolley was made from a folding wooden chair. Goldman and his mechanic Fred Young took the chair, raised the seat, put wheels on the legs, and put two wire baskets on top — one above the other. The whole thing folded flat when not in use. Goldman called it a 'folding basket carrier'. He patented it in 1938 (US patent number 2,196,914). The trolleys appeared in his Humpty Dumpty stores on 4 June 1937. Goldman expected an immediate success. Instead, he was shocked. Almost nobody used them. Men thought pushing a trolley looked weak. Women thought it looked like pushing a baby's pram, and they had spent years being told that pushing a pram was their job. 'I have pushed my last baby buggy', one woman told him. Goldman did something clever. He hired actors — well-dressed men and women — to come into his stores and push trolleys around. He hired greeters to stand at the door and offer trolleys to every customer. He ran advertisements showing happy people with trolleys. Within months, the trolleys became popular. Within a few years, every supermarket in the United States had them. By the 1960s, supermarkets were spreading around the world, and the trolley went with them. In 1946, another inventor, Orla Watson in Kansas City, invented the 'nesting' trolley — the kind that fits inside other trolleys via a swinging back door. This made trolleys easier to store. Goldman and Watson had a long legal fight over the patent. Goldman eventually paid Watson one dollar and got a licence to use the nesting design. The trolley we use today is mostly Watson's design. Why might one invention need a marketing campaign?

Points to consider (for the teacher)

Because new objects often feel strange. People are used to the way they do things. Asking them to do things differently is hard, even if the new way is better. Goldman's actors and greeters made the trolley feel normal — a thing that other people used, so a thing you could use too. The same problem has come up with many other inventions. Early cars were called 'horseless carriages' because people did not know what to make of a car without a horse. Early phones were rejected as unnecessary. Early personal computers were thought to be only for hobbyists. Every new technology has to be explained to people before they will use it. Students should see that 'good ideas' are not enough. The path from invention to everyday object goes through people's habits, fears, and identities. Goldman understood this. His marketing turned a strange new thing into a normal everyday object.

3

The shopping trolley changed shopping forever. With trolleys, customers bought much more. Supermarkets could grow larger, because customers could now carry larger loads. The aisles became wider, the shelves became higher, the product range expanded. By the 1960s, supermarkets in the United States were the biggest shops in the world. The trolley made all of this possible. But there was a cost. Small shops could not compete with the supermarket prices. Many butchers, bakers, greengrocers, and corner shops went out of business. Whole town centres, which had been full of small shops, became quiet as supermarkets opened on the edge of town. Workers who had been independent shopkeepers became checkout clerks on lower wages. Communities lost the connections that small shops had provided. This was true across the United States, then across Europe and other parts of the world. The trolley was not the only cause — cars, refrigerators, packaged food, and television advertising all played a role. But the trolley was a key piece of the system. Without it, supermarkets could not have grown so big. What does this teach us about useful inventions?

Points to consider (for the teacher)

That useful inventions have side effects, sometimes big ones. The trolley was good for customers — it made shopping easier and cheaper. It was bad for small shops — it helped supermarkets put them out of business. Both things are true at the same time. The same pattern applies to many other inventions. The car was good for travel and bad for street life. The internet was good for communication and bad for many local newspapers. The smartphone was good for personal connection and bad for some kinds of attention. Useful inventions reshape the world in ways nobody fully predicts. Strong answers will see that 'good' and 'bad' are not enough categories. The trolley made some lives easier and some lives harder. Honest history holds both at the same time. Students should also see that the side effects are still happening today. Online shopping is now doing to supermarkets what supermarkets did to small shops. The trolley is one chapter in a longer story of how technology reshapes daily life.

4

The shopping trolley has also become a famous object in everyday ethics. There is a popular online idea called the 'shopping trolley test'. The test goes like this: when you finish shopping, you have two choices. You can push your empty trolley back to the trolley bay, where the shop wants it. Or you can leave it in the car park, where it might block a car, scratch a paint job, or roll into the road. Nobody will punish you either way. There is no law about it. There is no shopkeeper watching. There is no reward for doing the right thing. There is no penalty for doing the wrong thing. The trolley test asks: do you return the trolley anyway? The argument goes that this is a real test of character. A person who returns the trolley does so because it is the right thing to do, not because they have to. A person who leaves the trolley behind is making other people do extra work for their own small convenience. The test became famous online around 2020. Different countries handle this in different ways. Germany has used a coin-deposit system since the 1950s — you put a coin (usually one euro) into the trolley to release it, and you only get the coin back when you return it. The discount supermarket chain Aldi made this system famous worldwide. In the United States, many supermarkets now use 'wheel-lock' systems — sensors at the edge of the car park lock the trolley wheels if it is taken too far. Both systems remove the need for personal choice; the trolley simply cannot be abandoned. What does this teach us about everyday ethics?

Points to consider (for the teacher)

That small decisions matter. There are thousands of moments every week when we choose between a tiny convenience for ourselves and a tiny cost to someone else. The trolley test is one of the clearest examples. Strong answers will see that this is one of the small ways the world is made better or worse. The deeper point is that systems and individuals both matter. Germany's coin-deposit system gets trolleys returned by changing the incentives. The United States' wheel-lock system gets trolleys returned by physical restraint. But the trolley test, in its pure form, is about what people do when nobody is watching and there are no incentives or restraints. Some people will always return the trolley because they believe in shared responsibility. Some people will always leave it behind. Most are somewhere in the middle. Students should see that 'character' is not a fixed thing. It is the sum of many small choices made when nobody is watching. The shopping trolley is one of the most ordinary tests of this, and it happens millions of times every day, in supermarket car parks all over the world.

What this object teaches

The shopping trolley (also called a shopping cart in North American English) is a wheeled metal basket used by supermarket customers to carry their shopping around the store. It was invented in 1936-1937 by Sylvan Goldman, the owner of the Humpty Dumpty supermarket chain in Oklahoma City, with the help of his mechanic Fred Young. Goldman's first trolley was built from a folding chair with two wire baskets and four wheels. The nesting (telescoping) trolley — the kind that fits inside other trolleys via a swinging back door — was invented in 1946 by Orla Watson in Kansas City. The trolley made the modern self-service supermarket possible by letting customers carry far more than they could in their hands. This changed shopping for billions of people — and helped supermarkets grow so big that they put many small shops out of business. Today, tens of millions of trolleys are in use worldwide. Different countries handle the problem of abandoned trolleys in different ways — Germany uses a coin-deposit system (made famous by Aldi); the United States uses wheel-lock sensors. The trolley has also become one of the most-discussed objects in everyday ethics — the 'shopping trolley test' asks whether you return your trolley when nobody is watching. The trolley is a simple object that shaped modern life and continues to ask quiet questions about how we treat shared spaces.

Date	Event	What changed
Before 1937	Shopping is done at small shops with counter service	Customers ask shopkeepers for goods; carry home what they can in baskets or bags
1910s-1930s	Self-service supermarkets spread in the United States	Customers pick goods themselves, but only carry as much as they can lift
4 June 1937	Sylvan Goldman introduces the shopping trolley in his Humpty Dumpty stores	Customers can now carry far more goods around the shop
1940	Goldman receives US patent number 2,196,914	The 'folding basket carriage for self-service stores' is officially patented
1946	Orla Watson invents the nesting trolley	Trolleys can now fit inside each other for storage — modern design begins
1950s onwards	Trolleys spread worldwide as supermarkets globalise	Almost every supermarket in the world now uses some version of Watson's nesting design
Today	Tens of millions of trolleys in use; coin deposits, wheel locks, online debate	The trolley is a global object with global ethics questions

Key words

Shopping trolley

A wheeled metal basket used by supermarket customers to carry their shopping around the store. Called a shopping cart in North American English, a trolley in British and Australian English, a buggy in some parts of the southern United States, and a chariot in French.

Example: A standard supermarket trolley is about 100 cm long and 60 cm wide, with four small swivel wheels and a deep wire basket. It can hold around 100 to 200 litres of goods.

Sylvan Goldman

American supermarket owner who invented the shopping trolley. Born in 1898 in Ardmore, Oklahoma, to a Jewish family. Owned the Humpty Dumpty supermarket chain. Invented the trolley in 1936-1937 with his mechanic Fred Young. Died in 1984.

Example: Goldman went on to become a multimillionaire. He used much of his wealth for philanthropy in Oklahoma, including the Sylvan N. Goldman Center for the Oklahoma Blood Institute.

Orla Watson

American inventor of the nesting (telescoping) trolley — the kind with a swinging back door that lets trolleys fit inside each other. Worked in Kansas City. Filed his patent in 1946. Goldman fought a long patent battle with Watson but eventually paid him one dollar in damages and got a licence to use his design.

Example: Almost every modern shopping trolley uses Watson's nesting design. Without it, supermarkets would need a much larger area just to store empty trolleys.

Self-service supermarket

A type of shop where customers pick goods from shelves themselves, then pay at a checkout. Replaced the older model where customers asked shopkeepers for goods. Became dominant in the United States in the 1930s and 1940s, then spread worldwide.

Example: The first self-service supermarket was probably the Piggly Wiggly chain, founded in 1916 in Memphis, Tennessee. The model has since spread to every country in the world.

Aldi system

A coin-deposit system for shopping trolleys, used by the German discount chain Aldi and many other supermarkets. The customer inserts a coin (usually one euro) to release a trolley; they get the coin back when they return the trolley.

Example: The Aldi system was developed by the Albrecht brothers in Germany in the 1950s and 1960s. It is now used in most German supermarkets and in many other countries.

Shopping trolley test

A popular online thought experiment about everyday ethics. It asks whether you return your trolley to the trolley bay when nobody is watching, even though there is no reward or punishment.

Example: The trolley test became widely discussed online around 2020. Some people see it as a real test of character; others say it depends on circumstances — distance to the trolley bay, weather, whether you have small children with you.

Use this in other subjects

History: Build a class timeline of supermarket history: corner shops with counter service (before 1900), first self-service stores (1916 Piggly Wiggly), Goldman's first trolley (1937), Watson's nesting trolley (1946), spread of supermarkets to Europe (1950s-1960s), out-of-town supermarkets (1970s-1980s), rise of online shopping (1990s onwards). The trolley is part of a longer story.
Design: The trolley is a piece of careful design. Discuss the features: nesting shape, swivel wheels, child seat, large basket, comfortable handle, easy stacking. Each was added to solve a specific problem. Compare with the traffic cone lesson — both are examples of everyday multi-feature design.
Ethics: Discuss the shopping trolley test. Strong answers will see that small daily choices matter, and that the test is not really about trolleys — it is about what we do when nobody is watching. Compare with other everyday ethics questions (tipping, recycling, picking up litter, holding doors open).
Economics: Discuss how the trolley helped supermarkets grow at the cost of small shops. The same pattern is now happening again with online shopping. Strong answers will see that new technology often helps some businesses and hurts others. Discuss whether this is fair, and what (if anything) should be done about it.
Citizenship: Shopping trolleys are shared property. Each one is used by hundreds of different people in a week. Discuss what 'shared property' means and how it is maintained. Compare with library books, park benches, public buses. All of these depend on most people doing the right thing without being forced to.
Geography: Different countries have different supermarket cultures. Some have large American-style stores; some have smaller European stores; some still have many small shops. Discuss how the trolley spread differently in different places. Why are corner shops still strong in Spain, Italy, or Japan, but weaker in the United States and Britain?

Common misconceptions

Wrong

The shopping trolley has always existed.

Right

It was invented in 1936-1937 by Sylvan Goldman in Oklahoma City. The nesting version (the one that fits inside other trolleys) was invented in 1946 by Orla Watson. Before these inventions, customers carried small baskets or bags.

Why

Calling the trolley 'timeless' hides the very recent history of one of the most universal objects in the world.

Wrong

Goldman invented the trolley and immediately became rich.

Right

The trolley was rejected at first. Men thought it looked weak; women thought it looked like a baby's pram. Goldman had to hire actors to push trolleys around his stores to make them look normal. It took years for the trolley to become popular.

Why

Most inventions take time to be accepted. Goldman's marketing campaign was as important as his invention.

Wrong

The shopping trolley is the same everywhere.

Right

Different countries handle trolleys differently. Germany uses a coin-deposit system. The United States increasingly uses wheel-lock sensors. The UK uses both systems and many trolleys are simply abandoned. The trolley itself is similar everywhere, but how it is managed varies.

Why

'One global standard' is a useful but incomplete idea.

Wrong

The trolley test is just an online joke.

Right

The trolley test is a serious question about everyday ethics — what we do when there are no rewards or punishments. It comes up in many other situations (tipping, recycling, returning library books). The online discussion is light-hearted, but the underlying point is real.

Why

Dismissing it as 'just a joke' misses what makes it interesting.

Teaching this with care

Treat the shopping trolley as a piece of design history, a piece of supermarket economics, and a piece of everyday ethics all at once. The lesson is light in tone for an ordinary object, but mention real costs honestly when discussing how supermarkets put small shops out of business. Be careful with the 'trolley test' material. Some students may have parents or carers who do not always return their trolleys, for any number of reasons — disability, small children, hurry, illness, social context. The trolley test works as a thought experiment, not as a way to judge individual people. Frame it as a question about systems and habits, not as a way to score who is good or bad. Mention that the test depends on context — distance, weather, ability, time pressure. Mention Sylvan Goldman's Jewish family heritage briefly (he was born to Jewish parents, his mother emigrated from Alsace, his father from Latvia). He is a good example of an immigrant family's contribution to American invention. Pronounce 'Sylvan' as 'SIL-van'. Pronounce 'Orla' as 'OR-la'. If students have family members who work in supermarkets, treat them with respect — supermarket work is real work, often hard and underpaid. Avoid framing the rise of supermarkets as a purely good or purely bad story. Both are partly true. Avoid making the lesson centre on any one country's supermarket culture. Germany's coin-deposit, Britain's wheel-locks, Japan's small shops, the US's car-park returns — all are real and worth mentioning. End the lesson on the present. Online shopping is now doing to supermarkets what supermarkets once did to small shops. The trolley is part of an ongoing story about how we shop and how we share public space.

Check what students have understood

Answer each question in one or two sentences. Use what you have learned about the shopping trolley.

Who invented the shopping trolley, and when?

Sylvan Goldman, the owner of the Humpty Dumpty supermarket chain in Oklahoma City, invented the shopping trolley in 1936-1937. He worked with a mechanic named Fred Young, basing the first design on a folding wooden chair with wheels and two wire baskets.

Marking note: Award full marks for any answer that names Goldman and the approximate date.
Why did the shopping trolley fail at first?

Customers thought it looked strange. Men thought pushing a trolley made them look weak. Women thought it looked like pushing a baby's pram. Goldman had to hire actors to push trolleys around his stores to make them look normal, and hired greeters to show customers how to use them.

Marking note: Strong answers will mention both the early rejection and Goldman's marketing campaign.
What did Orla Watson invent, and why is it important?

Orla Watson invented the nesting (telescoping) trolley in 1946 — the kind with a swinging back door that lets trolleys fit inside each other. Almost every modern shopping trolley uses his design. Without it, supermarkets would need much more space just to store empty trolleys.

Marking note: Award full marks for any answer that recognises Watson and the nesting design.
What is the Aldi coin-deposit system?

A way of making sure shopping trolleys are returned. The customer puts a coin (usually one euro) into the trolley to release it. They get the coin back only when they return the trolley. Developed by the Albrecht brothers in Germany and used by Aldi supermarkets worldwide.

Marking note: Strong answers will explain both the coin mechanism and the purpose (encouraging returns).
What is the shopping trolley test, and what is it really about?

A thought experiment about everyday ethics. When you finish shopping, you can return your trolley to the bay or leave it in the car park. Nobody will reward or punish you. The test asks whether you return it anyway. It is really about what people do when nobody is watching and there are no rules to enforce.

Marking note: Award full marks for any answer that recognises the test as a question about character or everyday ethics.

Discuss together

These questions have no single right answer. Talk in pairs or small groups, then share your ideas with the class.

The shopping trolley helped supermarkets grow huge, which put many small shops out of business. Is this a good story or a sad one?

Push students to hold both at once. Good: shopping became cheaper, easier, and more varied. Many families could feed themselves better on less money. Sad: many small shopkeepers lost their businesses. Town centres became quieter. Some workers ended up on lower wages in checkout jobs. Strong answers will see that 'useful' is not always the same as 'good'. The same pattern is now happening with online shopping. End by asking: should new technology be slowed down to protect older businesses?
Germany makes you put a coin into the trolley. The US uses wheel-lock sensors. Britain mostly relies on people doing the right thing. Which system is best, and why?

This is a creative question with real answers. Coin deposit: very effective, but requires trust in having coins, and can exclude poor people. Wheel-lock: very effective, but expensive and feels controlling. Trust-based: relies on people, fails when many people do not cooperate, but treats people as adults. Strong answers will see that each system makes a different bet about human behaviour. End by asking: what other shared resources work like this? Library books, park benches, public buses?
You finish shopping. The trolley bay is 50 metres away. It is raining. You have small children with you. The car park is empty. Do you return the trolley?

This is the trolley test in real conditions. Strong answers will see that real ethics is rarely simple. The pure trolley test (nobody watching, no incentives) is easy to argue about online. Real situations have weather, children, disability, time, energy. Discuss how 'doing the right thing' depends on circumstances. End by asking: what would make returning trolleys easier — closer bays, better paths, child-friendly trolley locks?

Teaching sequence

THE HOOK (5 min)

Without saying anything about the lesson, ask: 'When was the shopping trolley invented?' Take guesses. Then say: '1937 — only 89 years ago. We are going to find out about one of the most universal objects of modern life, and the small invention that made the supermarket possible.'
INTRODUCE THE OBJECT (10 min)

Describe the trolley: a wheeled metal basket invented in Oklahoma City by Sylvan Goldman. Pause and ask: 'How would shopping be different without it?' Listen to answers. They will lead naturally into the idea of how much we carry and how much we buy.
A SLOW START (15 min)

Tell the story of the trolley's rejection — men thought it looked weak, women thought it looked like a pram. Goldman hired actors and greeters to make it look normal. Discuss: most new inventions take time to be accepted. End by asking: 'What other inventions might have felt strange when they were new?'
THE TROLLEY TEST (10 min)

Discuss the question of returning trolleys. Mention the Aldi coin-deposit system, the US wheel-lock system, and the British trust-based approach. Mention the online trolley test. Discuss what it is really about — small choices when nobody is watching. Avoid being preachy.
CLOSING (5 min)

Ask: 'What does the shopping trolley teach us?' Take a few honest answers. End by saying: 'That a simple invention can change the way billions of people live. That new ideas often feel strange before they feel normal. That every supermarket trolley you have ever pushed was the descendant of a folding chair in an Oklahoma City shop in 1937. And that the way we treat shared things — like a trolley nobody is watching — says quietly who we are.'

Classroom materials

Before and After

Instructions: In small groups, students imagine a shopping trip without trolleys. They list the steps: find a small basket, carry it, fill it until it is heavy, carry it to the checkout, pay, walk to the car or bus with heavy bags. Then they list the same trip with a trolley. Discuss: what changes? Not just the lifting, but the time, the cost, the number of items bought, the size of the shop.

Example: In Mrs Cole's class, students realised that shopping without trolleys would mean smaller, more frequent shopping trips, more local shops, more time spent on food. The teacher said: 'You have just described how shopping was for most of human history. The trolley changed the pattern. Bigger shops, fewer trips, more goods bought at once. One invention reshaped a whole way of life.'

Design the Trolley

Instructions: In small groups, students design an improved shopping trolley. They must consider: a customer with small children, a customer in a wheelchair, a customer with a bad back, a customer in a hurry. Each group presents their design. Discuss: how do you balance many different users?

Example: In one class, students designed trolleys with adjustable handles for shorter and taller people, secure baby seats, side baskets for fragile items, and brakes for hilly car parks. The teacher said: 'You have just done what real trolley designers do. Every supermarket has thousands of different customers. The trolley has to work for all of them. Modern trolleys come in many variations for exactly this reason.'

Public Things

Instructions: In small groups, students list things that are shared — used by many different people but owned by nobody in particular. Examples: library books, park benches, public buses, water fountains, public toilets, school equipment, traffic cones, shopping trolleys. Discuss: how do these things stay usable? Strong answers will see that most people doing the right thing most of the time is what makes shared things work.

Example: In Mr Carter's class, students discussed how a single broken thing in a public space affects everyone. The teacher said: 'A scratched bus seat, a torn library book, an abandoned shopping trolley — each is a small loss to the shared world. Public things work because most of us treat them well. The trolley test is one small example of this.'

Where to go next

Try a lesson on the traffic cone for another piece of everyday street infrastructure with a careful design history.
Try a lesson on the rubber band for another small invention that became universal.
Try a lesson on the shipping container for another piece of standard design that runs the modern world.
Connect this lesson to economics class with a longer project on how supermarkets changed local economies.
Connect this lesson to citizenship class with a longer discussion of public space, shared property, and small daily choices.
Connect this lesson to design class with a longer project on multi-user product design — the trolley is a great case study.

Key takeaways

The shopping trolley was invented in 1936-1937 by Sylvan Goldman, the owner of the Humpty Dumpty supermarket chain in Oklahoma City. His first design was made from a folding wooden chair with wheels and two wire baskets.
The nesting (telescoping) trolley — the kind that fits inside other trolleys — was invented in 1946 by Orla Watson in Kansas City. Almost every modern trolley uses his design.
The trolley was rejected at first. Men thought it looked weak; women thought it looked like a baby's pram. Goldman hired actors to push trolleys around his stores to make them look normal.
The trolley made the modern supermarket possible. Customers could buy far more than they could carry by hand. Supermarkets grew, and many small shops were pushed out of business.
Different countries handle trolleys differently. Germany uses the Aldi coin-deposit system. The United States increasingly uses wheel-lock sensors. Britain mostly relies on trust.
The 'shopping trolley test' has become a popular thought experiment in everyday ethics. It asks whether you return your trolley when nobody is watching — and what your answer says about how you treat shared things.

Sources

The Cart That Changed the World: The Career of Sylvan N. Goldman — Terry P. Wilson (1978) [book]
Sylvan Goldman — Encyclopedia of Oklahoma History and Culture (2024) [institution]
Shopping cart — Wikipedia (2024) [institution]
Almanac: The first shopping cart — CBS News (2017) [news]
Meet the American who invented the shopping cart — Fox News (2024) [news]

Choose your language

The Shopping Trolley: A Wheeled Basket That Built the Supermarket

Questions for you

Common student difficulties — tick any you have noticed