Description: Science experiment: Hand crank bubble maker model, science experiment kits physics toys for kids toys.Material: Physical science experiment toy is made of wood, environmentally friendly, sturdy and durable, can be used for a long time.Development and Education: children through their own manual assembly, understand the scientific principles of the work of the toy, learn scientific knowledge, improve learning ability and practical ability.Applications:Diy science educational toy kits set can be used as teaching model, science competition, science education, science experiment model, educational assembly toys and so on.Gift: Science kits toy is suitable for children, teenagers and kids. It is an ideal gift for them to learn science knowledge and get scientific enlightenment while playing, teaching and having fun. Specification: Material: Wooden Size Chart: 145mmx85mmx145mm/5.71inchx3.35inchx5.71inch Package Includes: 1 Science Experiment Toys Note: 1.This is not infant toy, please take away from children to avoid eating.2.Please allow slightly errors due to manual measurement and different monitors.