NatureROCKS Granite Playground Climbing Boulders add active adventure and fun to any outdoor space. Each playground Climbing Boulder is artfully designed from real rock outcroppings and hand painted to look and feel like granite. The large climbing Climbing Boulders make a statement and add beauty and function to the playground or landscape. They appeal to all ages and bring exciting and authentic climbing experiences that help develop balance, strength and coordination. In addition, playground Climbing Boulders spark the imagination and invite creative play. The Medium and Large Climbing Climbing Boulders can be placed together to create an arch to add even more rock climbing and play opportunities. Our large climbing Climbing Boulders are made of durable, weatherproof glass fiber reinforced concrete (GFRC).