Description: LEARNING TOY - Through this DIY building toy, kids can construct their very own powered mini fan that uses a hand crank gyrating motion to making the fan turn. Through the construction process, kids can also learn about problem solving and attention to detail when reading the manual. Easy to Assemble - The Dynamo Lantern is one of the most easy to build educational assembly toys available. No need for screws or tools, kids can easily build the mini fan within 10-15 min following the detailed instructions. LEARN THROUGH PLAYING - Kids will learn from the mechanics of the hand-crank generator and how the energy is used to generate electricity,Physics experiment equipment. The Dynamo Fan is a safe and interactive experience that keeps kids engaged, which makes it one of the most unique electricity learning toys available. In our science kit for kids, you can also make the mini fan turn by rotating the hand crank in the opposite direction. A great and practical gift for children to enjoy and learn. Popular among schools and teachers for an interactive, hands-on learning experience as well as being one of the safest electricity learning toys in the classroom. Our kids STEM toys contain small parts, not for children under the age of 3. The faster the speed, the greater the power generation. Specification: Material:Plastic Size: Approx. 8x7.5cm/3.15x2.95inch Voltage: 0-3V, Current: 0-1A Color: Yellow and Green Sent Randomly Package Includes: 1 Piece Mini Fan 1 Piece Gear Box 1 Piece Handle 1 Piece Motor