Why do we pay money when we buy something?

When you buy bread, a toy, or a book from a shop, the person who made it or sells it has worked hard. They bought flour, baked the bread, and kept the shop open. All of this takes time and effort. Money is like a thank-you we give for that work.

Long ago, before money, people used to swap things instead. A farmer would trade wheat, and a shepherd would trade wool. But this was not always easy. If the farmer did not want wool, there was no swap. Money solved this problem. Everyone accepts money, because you can use it to buy anything you want.

Money also helps share things fairly. If everything were free, shops would run out and no one would make more. When we pay money, the person who made the product earns the money they need to make new products.