1. Material: wooden + rubber band 2. Applicable age: 3 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, help children perceive the music 5. Training children practical ability, hand-eye coordination, exercise thinking, develop intelligence, inspire creativity, explore science 6. Size: about 17.6 x 7 x 2.2cm
