The Steens For Kids Knight Tunnel is a great playful accessory for your childs Steens For Kids Midsleeper Bed. The Steens For Kids Knight Tunnel is a fabric tunnel, which attaches to the bed frame using screws in the metal poles. The Steens For Kids Knight Tunnel can be used on its own or with the matching Play Tent, which is also available in the vibrant, fun, knight theme design.