Pi-Pie Jigsaw Puzzle
Got a pie-loving mathematician? Or perhaps a math-loving baker? Or simply someone who'd appreciate the pi/pie pun and love a good ol' puzzle, here's the two-sided Pi-Pie Jigsaw Puzzle.
When solved, the 81-piece puzzle has an image of a yummy pie on one side, and a pie tin featuring pi to the 400th digits on the other.