DIY hand generator bulb circuit model kits, the operation and installation are simple. Electric current can be generated by shaking the handle, and the bulb will shine. Develop children"s hand, eye coordination, hands-on ability, and help children expand children"s scientific and mechanical interest. Great scientific experiments lab teaching aids school supplies, DIY scientific toy gifts for kids. Very fun science toys, kids can assemble it with parents. Main Material: Wooden Package Includes: 1 Set unassembled DIY Hand Generator Toy Kit When shopping, please pay attention to the size and dimensions of the product to ensure that it meets your needs. In the title and , we have provided detailed information about the product, including its features and specifications We want you to be completely satisfied with your purchase, so if you have any questions or concerns, please don''''''''''''''''''''''''''''''''t hesitate to contact us. We are here to help and will do our best to assist you. Thank you for choosing our product. We hope you enjoy it!