Photos: Partying it up for Pi Day

Kids work on their pieces of the "Pi Chain reaction," a group project in which more than two dozen teams each created a piece of a large chain reaction puzzle. The idea is that each piece would pick up where the previous piece left off and then continue on to the next piece. All together, they spanned 26 tables, and all had a "pi" theme of one kind or another.

Photo by Daniel Terdiman/CNET News.com