3.14159265359 ... Pi day (March 14)
A Pi plate, you know, for pie you can eat. We give it 3.14 stars!
Pi Temporary Tattoo
Perfect way to display pi, at least temporarily.
Come to the Math Side T-shirt
Forget the dark side and their cookies, the math side has pi.
Pi Math Adventure Book
Follow the adventures of Sir Cumference, Lady Di of Ameter and Radius in this series for students.
Pi Digit Pencils
Hand-writing pi takes a long time — and a lot of lead.
Math Glass Set
Every good mathematician needs a nice beverage.
How To Bake Pi Book
An irrational cookbook wrapped in a mathematics textbook.
Some, but not all of these items are through affiliate links.