BRAIN TEASERS - This wooden puzzle toy is inspired by traditional Chinese lock designs. It is an engaging logical thinking game that helps stimulate creativity and cognitive development. A great challenge for both adults and kids, making it an ideal choice for family entertainment and educational play. COMPACT SIZE - Product dimensions: 1.8 x 1.8 x 1.8 inch (4.5 x 4.5 x 4.5 cm). Weight: 0.04 pound (20 g). Its small size makes it a perfect addition to a desk or table, suitable for display in a living room, office, study, or waiting area. RECYCLABLE MATERIAL & HANDCRAFTED WOOD - Made from high-quality, sustainable wood with environmentally friendly, non-toxic finishes. This 3D puzzle requires careful observation and analysis to assemble the non-identical pieces into a cohesive diamond shape. It provides a satisfying challenge that engages problem-solving skills and spatial reasoning. UNIQUE DESIGN - Each puzzle is individually crafted from premium organic wood using traditional techniques. The natural grain and finish make every piece one-of-a-kind, combining artistry with intellectual challenge. HIGH QUALITY - We stand behind the quality of our product. If you are not completely satisfied, please and we will assist you promptly. Warranty included within 30 days of purchase.