The JPL Open House is coming up on May 2-3, 2009.
This popular event celebrates JPL's accomplishments with exhibits and demonstrations about the Laboratory's ongoing research and space exploration. Many of the Lab's scientists and engineers are on hand to answer questions about how spacecraft are sent to other planets, how scientists utilize space technologies to explore Earth and how researchers are searching for planets beyond the solar system.
It's really fun, I try to bring all my friends at least once. The JPL Open House webpage has more information.