Make the most out of play with the Hape Quadrilla Race To The Finish Marble Run Blocks. This kinetic marble toy features 9 distributor blocks, 2 curve rails, a spiral twist, 4 height adjusters, 4 stabilizer rings, 3 accelerators, 2 hole covers, 30 marbles, a windmill spinner, and a universal clamp that can be arranged to race marbles. Develop your child's fine motor skills and encourage their sense of imagination and scientific curiosity.