Sudoku is a simple but clever game that stimulates logic and reason in the brain. The erasable wonder board comprises 81 cells divided into 9 boxes for an infinite number of games. Includes wonder board, erasable pen, cleaning sponge, sand timer, 8 scorekeepers, 81 tiles, 44 puzzles of varying difficulty, 2 mini puzzles, 2 self assembly boards and detailed instructions. For 1 – 4 players. For 7 years plus.