Features: Classic Brain Teaser Interlocked: The classic KongMing Interlocked toy comes with a wooden box & 21 x different length sticks, take out the sticks from the box, find the mysteries to put them in order into the box again, but it 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 water printed, safe friendly for kids for play. Sensory Enhancement Puzzle Toy: The puzzle box toy originated from ancient China which called Kong-Ming Lock, IQ puzzle game with interesting logical thinking and perfect for development of brain, bring challenge to adults and kids, the magical design well stimulate children's desire to explore, exercise their hand & eye & brain 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 Adults: Suitable for kids as birthday gift, Christmas gift, 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. Box size 5.5 x 5.5 x 14.5cm/2.16 x 5.7 x 5.7 inch Material: Wood Style Option: Wood Color Box/Yellow Box Net Weight: approx. 200g/0.442 lbs Package Includes: 1 Set Wooden Puzzle Box Toy ( 1 x box, 21 x wood sticks) note: Warning: The toy may contain small pieces and need to pay attention to the swallowed risk. 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.