Playgrounds can include many other components besides the classic swings, see-saw, and slide. One of the most popular additions is a sandbox. Other additions include: parallel bars, an overhead ladder, a trapeze, trapeze rings, playhouses, a tower, a jungle gym, and a chin-up bar. Many playgrounds include sports areas, such as baseball diamonds, soccer fields, and basketball courts. Tether Ball is popular on playgrounds, as is the game Four Square.
Sources:
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