Function Description:1. DIY building block assembly experience.2. There are two kinds of motion modes of solar energy upgrade version: one needs to use a R6 / AA / UM3 to provide power, and the is to provide power from solar panel.3. a four-wheel drive model device, which can use the wheels moving vertically on the four corners to move forward, and can easily climb over 50 mm high obstacles.4. It includes all the materials required for simple snap or screw fit. Simple wiring is required to complete the assembly.5. chassis angles can be selected during setting.6. The power is provided by the motor and transmitted to the wheel through the assembled trapezoidal chain features of science and Education:1. The ability to seek knowledge, explore and innovate;2. to think independently and solve problems with hands and brains;3. Understand the mutual cooperation and interaction of mechanical transmission structure, the motion principle of motion mechanics and the transformation of power;4. Understand the generation, interaction and conversion of physical and mechanical power, electric power, solar energy, wind energy and chemical energy, so as to enhance children's understanding and exploration in physical, mechanical, chemical changes, new energy power and aspects since childhood.5. popularization, environmental protection, promotion and popularization.6. Understand the transmission principle of machinery and cultivate children's ability to seek knowledge and explore science and technology. s:Material: plasticWeight: 350 gSize: 18 * 17.3 * 5.6 cm : as shown in the figurePackage Included:A set of toys