A playground is defined by local laws which vary, but is generally defined as an improved area that is designed, equipped, and set aside for children's play (Playgrounds Law & Legal Definition). Playgrounds are governed primarily by local laws, which may impose various requirements regarding child safety and accessibility. One example of playground equipment on these parks include teeter totters, also known as a seesaw, is a long, flat board that is balanced in the middle so that when one end goes up the other end goes down. Teeter totters have been popular with children since before recorded history (The Definition of Teetertotter). Teeter totters traditionally were in playgrounds or parks until recently when they have been taken out due to injuries to children and liabilities to schools and playgrounds. Liability most easily defined is the state of being legally responsible for something (Liability). This means that if a child got hurt at a public park the city or whomever was in charge of the construction and maintenance of the park is responsible for their injuries. In turn park designers are bubble wrapping their parks, this is when aspects of a park that are dangerous are consciously protected. For example protective coatings are put on the ground either wood chips or rubber mats on the ground.