Two Sided Pi/Pie Puzzle

How clever is this? This 81-piece double-sided puzzle features cherry pie on one side, and a pie tin with pi carried to 400 decimal places on the other side! The puzzle is 8 inches in diameter when assembled. The only problem in terms of whether it works as a stocking stuffer is that the website doesn't give the size of the tin it comes in, but since they have other similar puzzles in small tins and the price is so low, I think it's probably small enough for a stocking stuffer. I think it would work nicely for teens or college students, or anyone into puzzles or math.

What: Two Sided Pi/Pie Puzzle
Where: Archie McPhee website
How much (as of today's post): $6.95 (plus shipping)