to teach about the concept of pi. On Pi Day, is piunder attack ? Where Einstein lived On the opposite coast, the leafy university town where Albert Einstein spent the last 22 years of his life is showing community-wide exuberance for pi. Princeton, New Jersey, kicks off Pi Day weekend on Thursday night with a reading by physicist Charles Adler, then heads into a full day of activities on Friday, including a walking tour of Einstein's neighborhood and a pizza pie-making contest. The pie-eating contest takes place at McCaffrey's supermarket, while an Einstein look-alike competition will match mustaches and wild gray hair at the Princeton Public Library. Pi fans who have been spending the last year memorizing digits can show off and compete at the library, where the winner among 7 - to 13-year-olds can take home a cool pi-hundred -LRB- That is, $314.15 -RRB-. The Historical Society of Princeton will have an Einstein birthday party. Tetsuya Miyamoto, inventor of the KENKEN puzzle, will speak at the library as well. Here are 10,000 digits of pi for you to memorize The brainiac town residents love this event because it's a way for them to celebrate how quirky they are, said Mimi Omiecinski, owner of the Princeton Tour Company, who started Princeton Pi Day in 2009. A lot of them get super into it. Last year about 9,000 people participated, she said. Along with her fascination with