Feature: 1. No pencil or paper required. 2. Made of high-quality wood and eco-friendly paint, safe and durable. 3. 81 thinking pieces, double-sided tiles for trial and error. 4. Designed with a drawer container, easy to store and carry. 5. Helps to think calmly, relieve stress and strengthen analytical skills. 6. Includes 81 numbers, 9 spare digits and 10 operation symbols. Specification: The wooden Sudoku board game includes 81 numbers, 9 spare digits and 10 operation symbols, a great gift for number puzzle lovers. Features: No pencil or paper required. Made of high-quality wood and eco-friendly paint, safe and durable. 81 thinking pieces, double-sided tiles for trial and error. Designed with a drawer container, easy to store and carry. Helps to think calmly, relieve stress and strengthen analytical skills. Includes 81 numbers, 9 spare digits and 10 operation symbols. Specifications: Material: Wood Color: Yellow Size: 22.5 * 22.5 * 3.6cm / 8.9 * 8.9 * 1.4in Weight: 700g / 1.5lb Package List: 1 * Sudoku Board 1 * Solution Booklet 81 * Tiles 9 * Spare Digit 10 * Operation Symbol Package List: 1 * Sudoku Board 1 * Solution Booklet 81 * Tiles 9 * Spare Digit 10 * Operation Symbol