This is a DIY planetary rover, which can help children learn the mechanical transmission structure of the vehicle model through hands-on assembly and practice learning Learn how electrical energy and solar energy are converted into mechanical energy so that children can understand and master the knowledge that solar energy is a clean new energy source from an early age Through learning and practice, we can systematically and comprehensively master the principles of energy conversion and mechanical motion structure, and learn to understand how human beings explore outer space planets A small planetary rover can create a future mechanical inventor and aerospace enthusiast Helps develop children's hands-on ability and creativity. Applicable age 6+ Understand the mutual cooperation and interaction of mechanical transmission structures; understand the movement principle of kinematics and the transformation of power Understand the generation and interaction of physical and mechanical power, electricity, solar energy, wind energy, and chemical energy, and mutual conversion to enhance children's understanding and exploration of physical, mechanical, chemical changes, new energy power, and other aspects since childhood Understand the transmission principle of machinery and cultivate children's scientific and technological knowledge and exploration ability Specifications: Product Model: HXC0101 Product size: 22.5 x 14cm Powered By: 2 x AA batteries (Not Included)/Solar powered Package included: 4 x Plastic Blocks 4 x Block Accessories 1 x Switch Wire 1 x Solar Panel 1 x Motor 4 x Tooth Box 1 x Axis Bar 1 x Crown Teeth 2 x Contact Battery Iron Piece 1 x Sticker 1 x English and Chinese Manual