Specifications: The splint contains four-square grid, six-square grid, and nine-square grid template. Increasing difficulty and step by step. 350 questions with questions and answers inside, a new challenge, the gameplay is not repeated. There is a magnetic adsorption design inside the chess piece, and the hand feels round and delicate, easy to carry, and can be played at any time by car and outing. Teach children to play unique numbers in the form of games to improve their logical thinking ability. The more they play, the smarter they become. Item Name: Sudoku Puzzle Material: Magnet, Wood, Paper Suitable for Age: 3 Years and Up Features: Gift, for Preschool Toddlers, Durable Size: 23.5cm x 22cm x 1.5cm/9.25" x 8.66" x 0.59" (Approx.) Notes: The quantity is about 100pcs, due to manual calculation, the quantity might has 1-5pcs more or less, hope you can understand, thank you. Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x Plywood 100 x Chess Piece (Blue 80, Yellow 20) 1 x Question Bank Instruction (Included 350 questions, with Questions and Answers)