DIY Assembly Experience: Engage in a hands-on building experience with this kit. Deformable, Electric, Competitive, Interactive: Offers dynamic play options. Understand Mechanical Coordination: Learn about the coordination and interaction of mechanical transmission structures. Learn Kinematics: Understand the principles of motion and transformation. Multiple Speed Options: The product features 2 selectable speeds. Develop Skills: Children experience interaction during assembly, fostering problem-solving, exploration, and innovation skills. Builds confidence, innovative thinking, and enhances intelligence. Unique Educational Selling Points: Cultivates learning, exploration, and innovation; independent thinking and practical problem-solving; understanding mechanical transmission; understanding motion principles; understanding various energy sources and their transformations. Specifications: Material: ABS Plastic Color: Green Sizes: 1: 100*95*160mm 2: 110*90*100mm 3: 90*125*123mm 4: 90*100*92mm Package Size: 315*195*70mm Package Contents: 3 x Plastic Parts 1 x Motor Connector 1 x Battery Box Connector 1 x Tape 1 x White Wire 4 x Screws 2 x Gears 1 x Hex Shaft 1 x Small Gear 1 x Shaft Gear