Wooden material: Wooden Sudoku Board Game Set is made of wood to ensure long term use and a safe gaming experience for children Compact and portable: Wooden Sudoku Puzzle Set measures 22.5cmx27cmx4cm/8.86inchx10.63inchx1.57inch, making it easy to store and transport, and suitable for playing when traveling or going out Education and entertainment: Number Thinking Game enhances children's memory, logical thinking, and problem solving skills while providing hours of entertainment Early learning tool: Sudoku Game Board is ideal for early childhood education, designed to encourage young thinking and promote cognitive development through engaging games Gift: Brain Teaser Toy is an ideal birthday or holiday gift for children Specification: Material:Wooden Size Chart: 22.5cmx27cmx4cm/8.86inchx10.63inchx1.57inch Package Includes: 1 Sudoku Board Game toy Note: 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.