Hi Rose!
I'm so excited to hear of your upcoming vacation! Disney was created with the family in mind, so you'll see that 99% of the rides, the little ones will get to come along too! We've traveled with a little one as small as 7 weeks old, and he joined in on the fun as much as possible!
Here are a list of attractions that the little ones won't be able to experience because of height restrictions. It's just a handful at each park compared to all Walt Disney World has to offer!
Magic Kingdom:
Big Thunder Mountain Railroad
Splash Mountain
Space Mountain
Stitch's Great Escape
Tomorrowland Indy Speedway (requires riders to be over 1 year old)
The Barnstormer
Epcot:
Soarin'
Mission: Space
Test Track
Disney's Hollywood Studios:
Tower of Terror
Rock 'n' Roller Coaster
Star Tours
Disney's Animal Kingdom:
Expedition Everest
Dinosaur
Primeval Whirl
Kali River Rapids
Have a magical vacation!
Amanda