Brain Teaser Kong Ming Puzzle

Good preowned condition. No flaws. Barely any signs of use. Train logical thinking, relieve stress, develop intelligence, and develop hand-eye coordination 2. Improve the dexterity, parent-child interaction tool 3. Wonderful intellectual toy Specifications: 1. Name: Dice Shape Brain Teaser Puzzle 2. Material: Wooden 3. Paint material: environmentally friendly water-based paint 4. Function: unlock the ring and lock 5. Product category: Kongming lock / Luban lock 6. Product weight: about 50-100G (single) 7. Product Size: about 5 * 5 * 5cm/ 1.97 * 1.97 * 1.97in 8. Age: 3+ years Thanks for looking CR3