A jungle gym (called a climbing frame in British English) is a piece of playground equipment made of many pieces of material, such as metal pipes or ropes, on which participants can climb, hang, sit, and—in some configurations—slide.In Australian English, the term "monkey bars" is sometimes used to refer to the entire jungle gym.[7] When Sebastian Hinton was a child, his father, mathematician Charles Hinton, had built a similar structure from bamboo with the goal of enabling children to gain an intuitive understanding of three-dimensional space through a game in which numbers for the x, y, and z axes were called out, and each child tried to be the first to grasp the indicated junction.[2][8] To reduce the risk of injury from falls, jungle gym areas often have a thick layer of woodchips, sand or other impact-absorbing material covering the ground.The American National Safety Council recommends that playgrounds have at least 12 inches (30 cm) of such material.
