The 3-in-1 Techno Gears Marble Mania Twin Twister includes over 200 pieces and is an action-packed marble maze with multiple building options. Complete with colorful twists, turns, and tracks, the set includes both a hand crank and a motorized gear lifter to take your marbles up to the top of the run for another exciting adventure. Enjoy even more fun by building the optional Corkscrew and Vortex 100+ piece sets as well! This is a great STEM educational product that encourages thinking and learning, challenges problem-solving skills, and expands knowledge of mechanics and engineering. Requires 2 AA batteries (not included). Choking hazard Imported Material & Care Plastic Spot clean only