A study in Sweden indicated that kindergarten children who could play in a natural environment had less illness and greater physical ability than children used only to a normal playground.
A good playground helps kids develop their physical abilities
As they walk around a playground or other area, text, video or audio pops up at various points to help them try to figure out why aliens were in the schoolyard.
A playground is a piece of land, at school or in a public area, where children can play.
If you describe a place as a playground for a certain group of people, you mean that those people like to enjoy themselves there or go on holiday there.
...St Tropez, playground of the rich and famous.