3 years & up. Create a life-sized obstacle course using this set of speed bumps and ramp. A construction from molded rubber with built-in UV inhibitors make this 3-piece set durable enough for indoor or outdoor gross motor activities. The ramp and both speed bumps feature grooves that create a non-slip texture. Large ramp measures 87" x 40" x 3", small speed bump measures 30" x 11" x 1". Store in a cool, dry place.