Description: [Interactive Learning Experience]: This hand-crank generator toy offers a hands-on approach to understanding the principles of electricity and energy conversion, making it an educational tool for young science enthusiasts [Materials]: Crafted from pp, this DIY science kit is designed to withstand regular use while ensuring safety for children during their exploration and play [Compact Design]: With dimensions of 5.6cmx5.6cmx13.5cm, this generator is compact enough for easy handling by small hands, yet large enough to clearly demonstrate the mechanics of power generation [Complete Set Included]: The package comes with everything needed to assemble the hand-crank generator, providing a comprehensive learning experience right out of the box [Encourages Creativity and Innovation]: By building their own working model, children are encouraged to think creatively and develop problem-solving skills as they explore scientific concepts in a fun and engaging way Specification: Material:PP   Size Chart: 5.6cmx5.6cmx13.5cm/2.20inchx2.20inchx5.31inch Package Includes: 1 DIY Hand Cranked Generator Kit Note: Please allow slightly errors 1-2cm/0.39-0.79inch differences due to manual measurement.