Our refillable wooden game board will be the center of your Sudoku game play. Slide out the plastic grid cover to change the two-sided sheets with pre-printed games. Wooden game board comes with 100 games in varied levels of difficulty from easy to extra hard. Open the drawer on the side to store your 81 "thinking pieces" for spots you are still working on and 81 printed number tiles for numbers you have figured out (both sets of tiles are red on one side, black on the other). Made of natural finished pine wood. 9-1/4" x 9-1/4" x 2". Ages 12+.