DescriptionAs 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: As Shown. - Material: Bamboo. - Package Size: Approx. 10x10x10cm/3.94x3.94x3.94inch. - 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. - Creative gaming tools, exploring your talents, simply relaxing after stressed working hours. - Suitable for ages over 6 years old.