Unsupervised playtime outdoors
It was not uncommon to see young kids playing outdoors without a grownup in sight during the 60s. Back then, the neighborhoods were still safe and most kids often played in groups where there is an older sibling or older neighbor around.
Source: Herald Weekly
There were no smartphones or computers to keep kids indoors. Once a kid was allowed to go outside to play, chances are they would all hang out together until dinner time. Today, some parents have to force their kids to be outdoors.