The Outdoor Thunderwall by Wood Designs adds fun, interactive play to any outdoor learning space. Children can experiment with a range of sound effects by tapping, banging or slapping the durable metal sheet. The durable, acetylated wood frame is nontoxic and won't shrink, warp or rot, even in inclement weather. Fully rounded edges and corners make this sensory wall extra-safe for little heads and heads. Made in the USA and backed by a 10-year warranty. Professional installation required. Choose a 72" or 48" height.