2 - 5 years or 5 - 12 years.The UPlay freestanding Crawl Tunnel offers many side portholes providing superior supervision as well as a brightened interior. Inspires curiosity and imaginative play. Easy-assembly and surface mount installation make this freestanding tunnel a quick and fun addition to any play space. Includes surface mount footers and ground spikes. Assembly required. Use Zone: 15' x 16'.