This high tech construction set includes 230 pieces to build and create your own introductory marble and gear run, Sidewinder includes a hand crank to move the marbles through the spiral lifter to the top of the twisting and turning tracks, Once built, kids can watch their marbles drop, spin and roll through their own fun and exciting creation, Ages 8+ years, WARNING: CHOKING HAZARD - Toy contains small parts and marbles, Not for children under 3 yrs, 230+ piece construction set, Hand crank, Expands knowledge of mechanics and engineering, Interlocking plates, gears, 3-D connectors, shafts, and channels, Inspires creativity SKU: LJI238