Features: 1. Made of high quality materials, which are safe and durable. 2. This DIY handmade work can improve children's hands-on ability. 3. It is easy to assemble and disassemble. 4. By assembling this model, your children can learn the circuit connection and application, experience the scientific experiment process. 5. It also can exercise your children's thinking ability. Specification: Condition: 100% Brand New Material: ABS Color: Color is Random Size: Approx. 12 * 8cm / 4.72 * 3.15inch Weight: Approx. 48g Power Supply Mode: 2 * AA Batteries (Not Included) Package List: 1 Set of DIY Physical Circuit Accessories Package List 1Made of high quality materials, which are safe and durable 2This DIY handmade work can improve children's hands-on ability 3It is easy to assemble and disassemble 4By assembling this model, your children can learn the circuit connection and application, experience the scientific experiment process 5It also can exercise your children's thinking ability