The Mercury stuff is easy to find, but they also have stuff honoring Gemini and Apollo astronauts. Go check it out as you walk to your car after a daytime shuttle launch (or landing)!
6/28: Managed to find parking on street/free too. Space-x launch. It was brutally hot. 2 1/2yr old didn't really enjoy it because of the heat, no shade...but I thought it was neat.