1. Material: plastic
2. Applicable age: 6 years old and above
3. Safe material, durable and durable, children play more peace of mind
4. Improve children hands-on ability and spirit of exploration, suitable for school and home teaching
5. Combining toys and scientific principles, make science more simple and interesting, let children understand the working principle of the submarine
6. Training children practical ability, hand-eye coordination, exercise thinking, develop intelligence, inspire creativity, exploration of science
7. Size: about 18cm long