STEM motorized experiment kit. Unique gearing system and reversible motor drives the models in two directions. Get hands-on with physics and engineering by constructing eight awesome walking machines! Explore the workings of gear trains, linkages, and non-circular gears as you create complex walking devices.  Each model moves in a different way.

• 8 models
• 134 pieces
• 44 page full color illustrated manual
• Requires 3 AA batteries, not included
• Intended for ages 6 and up

⚠️WARNING: CHOKING HAZARD - Contains Small Parts. Not for children under 3 years. Strangulation hazard - long string may become wrapped around the neck.