2 things about Disney World:
1) Ride the front of the monorail. Just ask as you go up. Wonderful view, tons of fun, and usually not crowded (they sit 4 up there if I remember correctly)
2) When a Disney staffer tells you the attraction is not age appropriate for your child listen to them. We were there for the Alien eXperience and many parents of younger children scoffed when a staffer said it wasn't appropriate. Those were the same children that had to be removed during the show because they were scared to death.