NatureROCKS Sandstone Playground Boulders bring active play and fun to any outdoor space! Playground boulders are artfully designed from real rock outcroppings and hand painted to look and feel like sandstone. Adds beauty and function to the playground and offers authentic climbing experiences. It's perfect for children ages 5-12 Helps develop balance, strength and coordination Climbing boulders spark the imagination and invite creative play. Consider combining large and medium Playground Boulders to create an arch to add even more rock climbing and play opportunities. Constructed of durable, weatherproof glass fiber reinforced concrete (GFRC) and is also available in a Granite finish Installation Instructions are included. Required safety landing surface not included. NatureROCKS playground boulders are IPEMA certified and meet ASTM standards for playground equipment. When installing climbing boulders, be sure to follow installation instructions to ensure proper placement.