BRAIN TEASERS - The intelligence puzzle toy originated in ancient China which was called Kong Ming Lock. Wooden game with an interesting logical thinking and perfect for brain development. Nice dfi for adults and children. Perfect gift as a family game and gift for your kids. COMPACT SIZE - Product dimension: 1.8 x 1.8 x 1.8 inches (4.5 x 4.5 x 4.5 cm). Weight: 0.04 pounds (20 g). Nice addition a desk or table, worthy of being exposed This one is so attractive that it can easily be used as a dcoration in a den, family room, living room, work table, desk or waiting room. RECYCLABLE MATRIX AND HANDCRAFTED WOOD - Assemble the different diamond-shaped pices of wood. Specially assemble non-identical batteries into a 3D shape. These mental puzzle toys will put your intellect to the dfi by stimulating an amazing crativit. This requires careful observation and bending, analyze its internal structure during assembly. ONE-OF-A-KIND - Each puzzle cube is completely unique, handcrafted from fully organic wood of first quality by the best matres craftsmen using only ancestral traditional methods and techniques. It is made of durable wood with cological and non-toxic paints. HIGH QUALITY, BUY WITH CONFIDENCE - We fully support our products and want to offer our customers a 5 canvas experience. If for any reason you are not 100% satisfied with this purchase, just send us a message and we will work quickly with you to resolve it properly. Warranty within 30 days. Thank you for your purchases