With multiple marble runs, varying levels, a hand crank, and more, the Techno Gears Marble Mania – Crankster 3.0 will fascinate all engineering enthusiasts! There are more than 100 pieces, including translucent and chrome connectors, a corkscrew lifter, and a hand crank to create your own marble and gear run. Twist, turn, loop, and experience new heights with the Crankster 3.0! This product aligns with and supports STEM (Science, Technology, Engineering, and Math) standards. Recommended for ages 6+ years.