1. Material: wooden
2. Weight: the red heart lock is about 130 grams, the red wine barrel is about 150 grams, the brown wine barrel is about 200 grams, and the ball lock is about 160 grams.
3. Size: red heart lock about 6x6x6 cm, red wine barrel about 7x7x7 cm, brown wine barrel about 7.5×7.5×7.5 cm, ball lock about 7.5×7.5×7.5 cm
4. Applicable age: 6 years old and above
5. Function: exercise spatial thinking ability
6. Features: safe material, fun and interesting. Fine workmanship, no burr, smooth surface. It can exercise children hands-on ability and learning ability.