Great place to explore with sufficient time. They advertise to be opened until midnight but when we arrived at 11:20pm - yes, it had been an eventful day and we just got there after 11pm, they said sorry it was too late. It was only when I requested my money back and mentioned the fact that they advertise to be opened to midnight and we were from Australia not local and flying to Miami the next day that the manager was called and we were allowed in. We covered pretty much everything as some areas we had seen elsewhere. It definitely is a worthwhile place to visit - I would recommend it.
Both of us enjoyed this while in Orlando _ lots of fun for kids and adults alike with plenty to intrigue and amuse you. Lots of hands on exhibits and some for the more adventurous like the endurance tests for wannabe astronauts in a spinning capsule. Sick maker!