Apr 23, 2014 10:15 AM
Ready for a more interactive Sudoku experience? Drop your pencil and paper and try Colorku: The Color Sudoku Puzzle ($35). The only difference between your favorite puzzle and this game is that it substitutes marbles for numbers. At least this time when you mess up, you'll be able to just dump the marbles over and start fresh rather than rubbing your eraser into a nub.
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