Figure 1. Philadelphia youngsters play in water from a fire hydrant.
A number of black children play on the water sprayed from a fire hydrant, with a couple of parked cars in the background.
Figure 2. Street barricade signs in New York City.
A wooden police barricade stops vehicles entering a New York street, with children playing in the distance
Figure 3. Roll-out sign used in New York City.
A wooden police barricade and signs stop vehicles entering a New York street, with children playing in the distance
Figure 4. Youngsters play baseball or learn to play basketball.
A group of black children and teens play basketball on a street closed to vehicles
Doing some searching and reading around #playstreets - these are some images of New York and Philadelphia play streets in the 1970s, from a 1976 article -