Hi Corey,
Welcome to the Moms Panel! You are super smart to plan ahead before your trip to the most magical place on Earth! You can find a list of the attractions with height requirements by visiting the
Traveling with Little Ones section on the Disney World Website. There you will find a PDF file on the right side of that page that lists attractions at all 4 of the theme parks, both water parks and DisneyQuest that have height requirements.
Of the attractions that have height requirements that she meets in the theme parks here are some that I would personally think about before trying. In the Magic Kingdom, I'd think hard about Stitch's Great Escape. Its pretty dark & you have a shoulder harnesses on while Stitch escapes & is "running" around the theater. I'd also let her look at the large hill on Splash Mountain & Big Thunder Mountain before she goes on.
At Epcot, let her know that the outdoor portion of Test Track is really fast.
At Disney's Hollywood Studios, The Twilight Zone Tower of Terror can be pretty intense for little ones. The drop sequence is in the dark & it various so you never know how many times you'll be dropping.
At Animal Kingdom, chances of her getting very wet (soaked) on Kali River Rapids are pretty high. Dinosaur is a loud, dark bumpy ride & can be frightening to younger kids.
If you have any questions about other attractions, please feel free to visit again. I'm super happy to assist you.
Wishing you many magical memories :-) Allison