Cranium® Super Fort® Twisty Tunnel building system lets kids connect and construct long, short, and curvy tunnels! A customizable three-segment fabric tunnel with a removable doorway and fabric connectors makes it easy for kids to build and rebuild fun tunnels.  How to Play Enjoy hours of fun matching Twisty Tunnel pieces and fastening them together with the kid-friendly fabric connectors. Follow the suggested tunnel designs or create your own. Once the tunnel is built, play inside until it’s time to make another tunnel. For added fun, Twisty Tunnel can be combined with Super Fort for the ultimate building and play experience. What's in the Box Twisty Tunnel includes three tunnel segments, a doorway, and a Super Fort connector.