Thanks for the info
I am such an obsessive planner that I have totally mapped out all days at the parks, without input from my DH, of course. I am taking into consideration that my son will be wide eyed straight out of the gate, but are there things that we should not miss?
I am afraid that my planning may gloss over things that others have found their 3 yr olds loved

We have billed this trip as a gift to our son, I have been to Disney (years ago) and
Disneyland Paris (2004) with my mom, but my DS and DH have never been and we don't know when we will return. Any suggestions for "don't miss" would be appreciated, my list is as follows:
Fantasyland
Mickey's Toon Town
Pirates
Tom Sawyer Is
Winnie the Pooh ride
Big Thunder Mtn
Railroad
Jungle Cruise
Parades/Fireworks
Character Breakfast
Bugs land
Animator Studio
Ferris Wheel
Aladdin
Monsters Inc
Brother Bear
Redwood Challenge
Thanks for the input.