I am jealous! You will have the most incrediable time! Even though I have been there so many times...there is nothing as magical as your first trip!
Some advice from a pro...if you will allow me...
You must stop in Adventure Land in the Magic Kingdom and have a Pineapple Dole Whip! I am not a pineapple fan, but love love love these delightful and cool treats.
You know the big silver sphere at EPCOT? How could you miss it, right? Anyhoo....we did not know there was a ride in that the first time we went to EPCOT...it is a great ride...don't miss it!
When getting on the monorail....ask a cast member to ride in front with the pilot...what an experience!