Wow, where to start... well with a 10 yrs old...
at MK: I really like haunted mansion it's a classic and your 10yrs old might like the 3 mountains (splash mountain, big thunder railroad mountain and space mountain) as for parades I just love the Spectromagic night time parade...
In MGM: the rock&roller coaster is great and so is Tower of Terror, for shows Beauty and the beast and Fantasmic are my fav.
in Animal kingdom, I did not try the Expedition Everest, but I like Dinosaur and it's tough to be a bug...
In Epcot, just walking around world showcase is a treat... I loved Turtle talk with Crush, very funny.
These are just a few of my must see, but everything in Disney is wonderful... don't forget to watch Wishes (fireworks)

Hope this helps... Have a great time.