Bored at the loo? Put that bathroom reader aside and pick up your pen because it’s time to exercise your mind while you flex your butt muscles. You won’t need anything else, because the puzzles are printed right on this roll of tissue paper. One square, two squares, three squares, four– solve as many as you can until it’s time to flush.

You might want to bring an extra roll of tissue if you can’t bear to use more of the Sudoku roll than you have to. It’s available online for about $17.

[ Product Page ] VIA [ TIWIB ]

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