Hi Susan! Welcome to the Disney Parks Moms Panel!
You are smart in planning ahead and becoming familiar with
the attractions that have height requirements. One of the best things about the Walt Disney World Resort is that most attractions are suitable for all ages, so families of all sizes can enjoy the rides together. You can find the height requirements for all rides on the page I just linked. As you scroll down, you will find the attraction's name and under that is the height required for the ride.
For quick reference, here are the attractions with height requirements for the two parks you mentioned:
Disney's Animal Kingdom -
Avatar Flight of Passage (44 inches or taller)
DINOSAUR (40 inches or taller)
Expedition Everest - Legend of the Forbidden Mountain (44 inches or taller)
Kali River Rapids (38 inches or taller)
Primeval Whirl (48 inches or taller)
Epcot -
RELAUNCHED! Mission: Space (40 inches or taller)
Soarin' Around the World (40 inches or taller)
Test Track (40 inches or taller)
I hope this helps with scheduling your days as you visit the Walt Disney World Resort! Please visit us again with any other questions you may have!
Tabitha