Description: Wood Brain Teaser Puzzle: This intelligence toy brain teaser puzzles are an old and traditional Chinese intelligence game. The puzzle simple, but it contains lots of mysteries. Classical Wooden Toy: These disentanglement unlock puzzle can train their children\'s ability to solve problems, develop intelligence, challenge your mind and patience. Development Toy: wooden puzzle disentanglement game fantastic item for children gift to exercise their brain. A great challenge for kids and adult intelligence. Best Gift: This wood unlock interlock is classic intelligence IQ training game. It\'s helpful to keep your brain focused, expands your mind, exercise the logical thinking abilities. Material: These brain teaser puzzles made of wooden material, smooth edge, sturdy and durable. Suitable: Suitable for 4 years old and up.Size Chart:single block length: 9cm/3.54inchPackage Includes:1 3D Brain Teaser Puzzle ToyNote:1.This is not infant toy, please take away from children to avoid eating.2.Please allow slightly errors due to manual measurement and different monitors.