Kids play tough; it means that they will occasionally fall, bruise their knees and skin their ankles. Using hard surfaces like concrete, pavers, earth or grass can be life threatening. According to the Centers for Disease Control and Prevention, nearly 80% of children injuries is a result of falling from playground equipment. Improper surface material multiplies the risk. More than 200,000 children 14 and younger visited emergency rooms with playground-related injuries. A half of them has severe fractures, concussions, internal injuries, dislocations, and amputations. Lethal cases are rare but happen every month in the USA. Studies reveal that 79% of injuries on public playground equipment and 81% of the injuries on residential equipment occurred due to falls. Since playground materials account for a considerable amount of accidents, efforts to study and develop safety guidelines and shock attenuation standards for playground surfaces are continuously elaborating.