Friction Science Experiment Material Package Technology Small Production Labor-saving Children DIY Creative Friction Car

Material:Wooden Specification:93*45mm DIY or not:Yes Packaging:Other Whether multi-function:Yes Whether electric: No Ability to develop: hands-on brain Science toys type: physics Colour: friction experiment applicable age:Junior (7-14 years old) 3:Science experiments 2:Children's toys creative science education model 1:DIY science and technology small production