Climbing is incredibly valuable for child development, as it provides opportunities to build physical, cognitive, social and emotional skills. In fact, climbing is so important that it is now included in the New Physical Education curriculum that focuses on lifetime fitness for every student. The Climbing Wall Overlay is made of firm foam blocks (covered with vinyl) that are sturdy enough to hold climbers of all ages, and includes hook Velcro border on the backside for easy attachment to numerous Tumbl Trak products.