Moon pies were invented in 1919 by Earl Mitchell. His son Ed Mitchell Jr. wrote "I’m sorry dad didn’t patent that thing. I’d have a Cadillac on each foot."
A moon pie is a pastry which consists of two round graham cracker cookies, with marshmallow filling in the center, dipped in chocolate or other flavors. The traditional pie is about three inches.
Source: Wikipedia
Click here for my flickr page of moon pie images.
What do you get when you take green cheese and divide its circumference by its diameter?
Moon pi.