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.Specification:Material:WoodenSize Chart:6pcs Size: 26.5cmx9.5cmx18.8cm/10.43inchx3.74inchx7.40inch9pcs Size: 26.5cmx9.5cmx27cm/10.43inchx3.74inchx10.63inchPackage Includes:Optional Package6/9 Pieces 3D Brain Teaser Puzzle ToysNote:Please allow slight dimension difference due to different manual measurement.