The lock may look simple, but it contains lots of mysteries. Easy to take apart and difficult to reassemble. Not only it can enhance your ability, and can even be an extraordinary plan. The lock may look simple, but it contains lots of mysteries. Easy to take apart and difficult to reassemble. Not only it can enhance your ability, and can even be an extraordinary plan. Suit for both children and adult. Use your brain, exercise your patience, is unable to untie the knot, but as long as the master of the structure, is sure to solve. Caution 1.Children must use it under the adult's tutelage. 2.Don't throw the away to each other. 3.Don't use it if there is any problem. 4.Don't keep the toy in the mouth to prevent children devour small parts in the toy. TRIPLE THE FUN : 6 different shapes,3 Iron Metal Puzzle + 3 Wooden Kong Ming Lockbrain teaser condenses with traditional Chinese culture and quite interesting. EXCEPTIONAL BRAIN GAMES: This educational toy and puzzles set will challenge your childs intellect by stimulating amazing creativity. Your childs mind will be sharpened enough to develop their problem solving capacity through reasoning, development of mental stamina and boosting their self-confidence. NOVELTY GIFTS FOR KIDS AND ADULTS - Great gift for boys, girls, men and women ages 5 to 105. The perfect size makes it easy for small and large hands to play comfortably. Everyone can enjoy these unique novelty gifts. ATTENTION: Recommended for ages 5 and up, children should be used under adult supervision. SATISFACTION GUARANTEED: We offer educational toys and excellent customer service and if youre not totally satisfied with your purchase; we also offer a risk-free, No-Questions-Asked, 100% Money-back Guarantee! Click Add To Cart now!