It is summer and and all over the country kids will be spending time on swing sets. These may be located in neighborhood playgrounds, at summer camps, or in their own yards. For anyone whose every wanted to learn more about swing sets, here are some basic and random facts about them, and about playground equipment in general.

Most swing seats are made of rubber or plastic, but they can also be made of wood, canvas, metal and composite materials.

Swing sets are rated by the maximum weight of children. It is usually related to age, but most sets should list a weight limit.

Toddlers and babies have specially designed swing sets that are usually made of plastic. It is also possible to buy safety seats for use by younger children on sets that are rated for older kids.

The majority of reported injuries on swing sets are lacerations, contusions, and abrasions. Sprains and muscle strains are also common.

Less than six percent of injuries are serious enough to require hospitalization and the number of fatalities is negligible. In fact, only 22% of reported swing set injuries are actually the result of accidents on swings. Most injuries happen on accessories like ladders, slides, and climbers.