We visited the Kennedy Space Center in Florida. There are a lot of 3D movies available at the Space Center. It did not seem that it was geared toward children. Most of the information pertains to Astronauts and Space Rockets. My sister is very interested in all things Space and she was disappointed. There is not information about the planets or space, just Astronauts and Rockets.
The tour that is available was excellent. The bus you ride is air conditioned and plays videos throughout the tour. Our guide was very informative and described how rocket launches work. We drove to the Vehicle Assembly Building and was able to see a structure being built. Space X also has their building near that location as they prepare for their next launch.