NASA center in Houston is better than Kennedy's space in Florida! It worth it to spend a whole day there. We spent about 4 hours in NASA and still think it was not enough. Thanks to the tour guide, he suggested us to run to NASA train tour first before visiting the galleries. The train tour took about an hour, and they will show you where the astronaut works and the latest projects in NASA, which was super cool. Later on, we have enough time to walk around and experience the collections - like touching a piece of moon and mars and having our lunch with astronauts in the diner. I'll recommend this tour to all my friend. Thank you for the great job.