ITEM NAME:DIY Technology Gadgets Pulling Robot Construction Set Kids Science Experime P3M8 DIY Technology Gadgets Pulling Robot Construction Set Kids Science Experime P3M8 Theme: Transportation,Sports type: Robotics Learning Kits Suitable age: over 5 years old Principle: The chemical energy in the battery converts to the kinetic energy of the motor, which transfers the energy to the motor shaft through the gear. The motor shaft drives the two legs of the robot to do alternately moving forward. colour:Wood color (Tops color random) Random colors cannot be selected Material:wood size:16*11.5*6.5 cm Package Contents: 1*Pulling Robot Note: A few gaps should be left between the sleeve and the leg to facilitate the movement of the leg. Attention the places of wires. You can design the robot by yourself..1 Pulling Robot. Principle: The chemical energy in the battery converts to the kinetic energy of the motor, which transfers the energy to the motor shaft through the gear. You can design the robot by yourself.