Move over boring marble runs, there’s a new kit in town! Witness physics in action with an innovative, flexible system of tracks that includes everything you need to challenge yourself or others to a marble-run-building competition. With 32 challenge cards, two rapid-fire launchers, and enough parts for two kids (or two teams) to build their vertical marble runs at the same time, this set turns Gecko Run into a fun, thrilling engineering game. Thanks to nano pads (safe little strong suction cups), any vertical surface has the ability to become a marble run surface.From Thames & Kosmos for ages 8 yrs.