Techno Gears Marble Mania sets are multi-piece construction sets that allow aspiring engineers to create their own working masterpieces. This set contains more than 100 pieces, including translucent and chrome connectors, a corkscrew lifter, and a hand crank. Kids can build their own marble and gear run with exciting twists, turns and loops. Aligns with STEM standards. For ages 6 and up.