Features: brand new and high quality Classic Brain Teaser Interlocked: The classic Kong-Ming Interlocked puzzle equipped with a wooden base & small pieces tiles, through twist and find the mysteries to disassemble the 3D puzzle, but assemble back to the original shape is not easy, the brain teaser well develop intelligence and improve problem solving ability, exercise the brain and finger flexibility, keep your brain active while killing off the boring for time. Selected Qualification Material: Made of qualified solid hard wood, well polished and smooth edges as well as wear-resistant, non-toxic colorful water painted safe friendly to your kids. Sensory Stimulation 3D Puzzle: The 3D puzzle toy originated from ancient China which called Kong-Ming Lock, the wooden puzzle game with interesting logical thinking and perfect for development of brain, bring challenge to adults and kids, the magical design with well stimulate children's desire to explore, the concept of teaching in fun to attract kids’ concentration, exercise and stimulate their hand & eye coordination. Portable Brain Teaser Toy Puzzle: The portable size which is easy to take with you, solve these puzzles in the car, at school, at home or office, offer you of endless fun with friends with these handheld brain teaser wooden twisters. for Ideal Gift for Kids or Adults: Suitable for kids or adults as birthday gifts, Christmas gifts, and encourage them free to explore their small world and brain training, which also a perfect interaction game for parent-children. Specifications: Product Dimension: approx. 6 x 6 x 4cm/2.36 x 2.36 x 1.57 inch Material: Wood Net Weight: approx. 100g/0.22 lbs Package Includes: 1 x Wooden 3D Puzzle note: Please allow 1-2cm errors due to manual measurement. Due to the difference between different monitors, the picture may not reflect the actual color of the item.