Unleash a storm of fun! The 3-in-1 Techno Gears Marble Mania TwinTwister Max construction set incudes over 200 pieces and is an immersive, 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. Watch as the marbles race down the dual spiraling tracks, you'll be mesmerized by the captivating movements and vibrant colors. Spin into even more fun by building the optional Corkscrew and Vortex 100+ piece sets as well! This is a great STEM educational product. Requires two "AA" batteries (not included)