Description: - 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 - Develop children's hand ; eye coordination, hands-on ability, and help children expand scientific ; mechanical interest. - Great scientific experiments lab teaching aids supplies, DIY scientific toy gifts for - Very fun science toys, can with parents. - Main Material: WoodenSize Chart:Assembled size (L x W x H): Approx 13 x 9 x 10cm/5.12 x 3.54 x 3.94 inchPackage Includes:1 Set DIY Hand Generator toy setNote:Due to the difference between different monitors, the picture may not reflect the actual color of the item.Due to manual measurement, there may be 1-2cm error in size.