Features: 100% brand new and high quality 1.DIY building block assembly experience. 2.deformation, electric, competitive, interactive. 3.understand the mutual coordination and interaction of mechanical transmission structure 4.learning to understand the kinematics of the principle of motion and conversion. 5.products have 2 speed for the exchange. 6.children experience in assembling interaction, develop their problem solving process work skills, ability of exploration and innovation. Help children to build self-confidence and innovative thinking ability and intelligence development and training. Product unique technology education selling point (to cultivate children's ability to grow a variety of processes) 1.ability to learn, explore and innovate; 2.independent thinking and hands-on mental problem solving skills; 3.understand the mutual coordination and interaction of mechanical transmission structure; 4.understand the principle of motion and dynamic transformation; 5.understand the mechanical power, electric power, solar energy, wind energy, chemical energy generation and interaction and mutual enhancement of the transfer of the child in the physical, mechanical and chemical changes, new energy and other aspects of the understanding and exploration.Package Content:(with retail package) 3PC Plastic parts 1PCmotor connector 1PC battery box connector 1PC adhesive tape 1PC white wire 4PC screw 2PC gear 1PC six angle shaft 1PC small gear 1PC shaft gear