1. Material: plastic
2. Applicable people: unlimited
3. Applicable age: over 3 years old
4. Weight: about 14g/piece
5. Size: about 8x4 cm/piece
6. Press the silicone button repeatedly to train finger flexibility
7. Soft silicone bubbles that can be easily pushed back and forth to relieve anxiety
8. Note: there is no pattern on the reverse side