At Kennedy Space Center one of the attractions is named the Rocket Garden. It is a little walk through area outside where various rockets are standing upright with plaques explaining the missions they went on. It is interesting to see the size of the different rockets, along with which were manned. Although its cool to see them, they are not near as impressive as the big attractions such as Saturn V and Atlantis. It's just something quick to walk through, but don't spend too much time here. Make sure to do the big attractions first to make sure you have time for them.
Points of interest
Cocoa Beach is famous for surfing, it's not far from Kennedy. Stop there in the afternoon!