Gear Triple Action Physics Experiment Variable Speed Transmission Material Kit Kids Puzzle Toy, Gear Triple Action

1. Material: wood
2. Safe material, play-resistant and durable, children play more at ease
3. Improve children hands-on ability and exploration spirit, suitable for school and home teaching
4. Combine the toys with scientific principles, make science more simple and interesting, let the children fall in love with science
5. Train children practical ability, hand-eye coordination, exercise thinking, develop intelligence, inspire creativity, explore science
6. Size: about 12 x 6 x 18cm