Visited the Kennedy Space Center today to check out the new Gateway Deep Space Launch Complex and Spaceport KSC. They do have a slightly used first stage Space X Falcon 9 hanging from the ceiling. Give you a context of how large it is. This is the business end with the landing legs folded in near the 9 engines.
Inside the Gateway building is the Spaceport KSC voyages, each of which takes to on a different journey into space. Strapped into seats you are taken on a journey thru space (think Soarin’ in space). I did Mars and Cosmic Wonders.
In the grand scheme of things I would recommend you take the bus ride out to the Saturn building first then when done with that jump right into the Atlantis exhibit and save the Gateway Complex for the later part of the day.