I went with my son (5) in September 2002. We were the ONLY people there, so it was a bit spooky. The museum is small and a bit cheesy, but it was exactly what I expected. There is a website for the museum. If you have nothing else planned and want to do something for about 30 minutes or so, then I say go ahead and check it out, just don't expect a lot. However, I do feel that small children may be scared by some of the exhibits.
I hope you have a great trip!