The Ultimate Wall Coaster Set: Includes Super Starter Kit, Extreme Stunt Kit, Crazy Stairs and Super Loop Add-On Packs Wall coaster is a totally different kind of marble run. Turn your wall into a roller coaster! Unlimited designs! Get over 20 feet of track and all of wall coaster's zany tricks and exotic parts. Use your imagination and the basic laws of physics and gravity for hours and hours of fun. Create fast drops, big jumps, and crazy twists, then tear down, rebuild, and start again! Invented by a 12-year-old marble run aficionado. Develops strategy and spatial reasoning.