Science experiment model: Hydroelectric generate electricity model, science experiment kits physics toys for kids toys. Material: Physical science experiment toy is made of durable material, environmentally friendly, sturdy and durable, can be used for a long time. Development and Education: Children understand the scientific principles of the toy's work by putting it together manually by themselves, learn scientific knowledge and improve their learning ability and practical ability. Use: Science kits toy can be used as a teaching model, science competition, science experiment model, educational assembly toys and so on. Gift: Educational toy is suitable for children, teenagers, kids and adults to play. It is an ideal gift for them to learn science knowledge and get scientific enlightenment in playing, teaching and having fun. Size Chart: 9cmx8cmx15.5cm or 3.54inchx3.15inchx6.10inch Package Includes: 1 Science Experiment Model Note: Please allow slightly errors due to manual measurement and different monitors.