Activity & Learning Toys

DIY Electric Rotary Engine Model Kit, High-Speed Simulation Dynamic Engine Up To 600 RPM, Ideal for STEM Education, Tech Hobbyists, and Adult Collectors Explore mechanical engineering with a 4-stroke internal combustion engine model kit, featuring highly textured metal parts for an immersive building experience. Perfect for those eager to learn about engine mechanics by assembling their own model.... DIY Electric Rotary Engine Model Kit, High-Speed Simulation Dynamic Engine Up To 600 RPM, Ideal for STEM Education, Tech Hobbyists, and Adult Collectors