What did children do in the 1920's?

In the U.K. they started at 5 and in most other countries at 6.

Many things happened during those two decades; the Great Depression, Prohibition, the rise of fascism in Europe, come immediately to mind. And millions of other things.

treated very badly couldn't get jobs outside of home had to stay home and: cook clean mother couldn't even buy anything treated as if they were worthless and unimportant

Cars

i think it wuz about 1 shilling