Hape Quadrilla Race to the Finish Wooden Marble RunDescription: Get started building your own marble runs with this Quadrilla beginners set. Drop two marbles into the top and watch as they race down different paths to the bottom. Features: Includes: 9 distributor blocks, 2 curve rails, a spiral twist, 4 height adjusters, 4 stabilizer rings, 3 accelerators, 2 hole shutters, 30 marbles, a windmill spinner and a universal clamp Windmill spinner can be attached to any rail with the enclosed clamp Age 4+