In Western countries, many children do chores to get pocket money. They usually start to do this when they are 10 years old. School students have to do homework and study for tests. They don't have a lot of free time on weekdays. They often do the chores at the weekend. Young kids only do easy chores. So they don't get much money. But that's all right. Many of them only want to buy candy. And candy is cheap. They help do the dishes after dinner, and feed the family cat or dog.
When kids get older, they want to buy more expensive things. Then they have to work harder! They often wash the family car, cut the grass, walk the dog or cook dinner.
Some jobs are a good way for kids to learn new things. For example, they can learn to use a lawn mower(割草机)or how to cook. Of course, their parents help them at first.