This day we only visited NASA Space Center. If you decide to visit it ask for some guidance at the entrance. You need to reserve tram tickets in advance before they are all given away (they are free). There are also several theaters with scheduled shows. The shows tell you a lot of details and we found them very motivating. But most of all we enjoyed flight simulator ($7 / 4.5 min). Makes you feel in a military aircraft where you are controlling it and firing at the enemies.