Sorry for the title, couldn't resist!
Kids playing on the streets of New York City, 1947. By Ralph Morse.
I'm not sure what version of hopscotch this is! Source
A boy makes a scooter from a fruit crate, rollar skate, and board. Source
Jumping into the river. Source
A little boy chasing pigeons. Source
Playing jacks. Source
A girl balancing a seed pod on her nose. Source