Description As a kind of Chinese traditional puzzle game, Kongming lock carries with mysterious mathematical and physical principles. Fine craft make it not easy to decay and deform. It can add a lot of fun to their lives and simply relaxing after stressed working hours. A perfect intelligance toy to help children or you development. Features - Color: Wood color. - Material: Timber. - Size: 4.5x4.5x4.5cm/ 1.77x1.77x1.77 inch. -Random with or without bag - Lu ban puzzle cube with fine craft design, not easy to decay and deform. - material with smooth surface design, no thorn, safe and durable for long lasting use. - Relief stress, develop intelligence, hand-eye co-ordination skills, improve dexterity, foster logic thinking, parent-child interaction, prevent Alzheimer's and more. - Teaches dexterity and coordination. Suitable for ages over 6 years old. - Creative gaming tools, exploring your talents, simply relaxing after stressed working hours.Package List10 x wooden puzzle toys