BRAIN TEASERS - Intelligence puzzle toy originated from ancient China which called Kong Ming Lock. Wooden game with interesting logical thinking and perfect for development of brain. Nice challenge to both adults and kids.Perfect gift as family game and gift for your kids.COMPACT SIZE - Product dimension: 1.8 x 1.8 x 1.8 inch (4.5 x 4.5 x 4.5 cm). Weight: 0.04 pound (20 g). Handsome addition to a desk or table, worthy of displaying! This one is so attractive that it can easily be used as a decoration in a den, family room, living room, working table, office or waiting room.RECYCLABLE MATERIAL & HANDCRAFTED WOOD - Assemble the different wood pieces into a diamond shape. Precision assemble non-identical pieces into a 3D shape. These mental puzzle toys will challenge your intellect by stimulating amazing creativity. It requires careful observation and thinking, analyze its internal structure when assembling.ONE-OF-A-KIND - Every puzzle cube is completely unique, handcrafted from premium grade, fully organic wood by the finest master craftsmen using only time-honored traditional methods and techniques. It is made of sustainable wood with