The hand generator material package needs to be assembled manually by yourself. In the process of DIY, you can not only get a sense of accomplishment, but also improve your practical ability. Mainly made of motor, wood board, and other materials. When the handle is shaken quickly, the electricity generated will turn the bulb on. Features -Color:Multi -Material:Wood, motor, glass -Size:15.00X12.00X8.50cm/5.89X4.72X3.34in -Note: Bulb Accessories are random color - Kids DIY hand generator toy, train your children observation capability, thinking and analytical skills. - Turn the handle and the electricity generated will turn the bulb on. The faster the handle is turned, the greater the power generated. - DIY assemble wooden projects for kids is happy and easy to learn, exercise your children practical ability. - The hand crank generator is easier for your child to learn basic mechanical principles and improve your child's hands-on ability. - Nice kids and students educational toy that you can have one and let your kids have a great fun from it. Package list: 1 x set of generator kit