Hello Travilla!
WOO HOO....Your very FIRST vacation to the Most Magical Place On Earth!!!! AND...you will be celebrating a birthday!! It can't get any better than that!
Here is a list of my favorite attractions and shows for families with small children. I have five kids under 10, so they all voted and came up with this list:
Magic Kingdom:
* ALL of Fantasyland
* Buzz Lightyear's Space Ranger Spin
* The Magic Carpets of Aladdin
* Tomorrowland Transit Authority PeopleMover (a.k.a. TTA)
EPCOT
* Imagination! Pavilion (Journey into Imagination with Figment and Imageworks)
* Spaceship Earth
* The Seas with Nemo and Friends Pavilion (The Seas with Nemo and Friends Attraction, Turtle Talk with Crush and the incredible Coral Reef Aquarium!)
Hollywood Studios:
* "Honey I Shrunk the Kids" Movie Set Adventure (HUGE playground...so fun!)
*
Disney Junior - Live on Stage! NOTE: The Playhouse Disney Characters are HERE!!! Woo Hoo!
* Toy Story Mania!
* Voyage of the Little Mermaid
* Beauty and the Beast - Live on Stage!
Animal Kingdom
* Affection Station (Really cool petting zoo)
* Kilimanjaro Safaris
* The Boneyard (another HUGE playground!)
* TriceraTop Spin
* Finding Nemo - The Musical
* Festival of the Lion King
I hope this helps in your planning! If you have other questions, please let me know!
Have a MAGICAL day!