Robco - Electronic Brain Games: Sudoku Puzzles

The number-crunching fun of Sudoku comes alive in a new way with Sudoku Puzzles. This exciting and challenging book allows you to use the innovative Brain Games pen (not included) to unleash fun interactivity in every puzzle. Use the pencil end of the Brain Games pen to solve one Sudoku puzzle grid, then use the optical reader end to activate the matching sound-enabled puzzle solution grid to verify your guesses or hear the solutions to individual puzzle cells. You can even increase the challenge by using the timer feature and seeing how quickly you can solve each puzzle.