A playground, playpark, or play area is a place designed to provide an environment for children that facilitates play, typically outdoors.

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ESA Has a Playground for Mars Rovers to Learn how to Explore the Red Planet

Physicists Determine The Ultimate Strategy For The Playground Swing

Physics confirms the best way to make a playground swing go higher

Physicists Manipulate Magnetism With Light – “Playground” Created for Observing Exotic Physics