Hi Carole,
Thank you so much for visiting the Disney Parks Moms Panel with your question. We on the panel love helping guests to plan magical vacations!
There are some
attractions at Walt Disney World with height requirements. The link that I just provided has a chart with height restrictions at Magic Kingdom, and has links to similar charts for Epcot, Disney's Hollywood Studios, and Disney's Animal Kingdom Park.
If you are interested in the height requirement for a specific attraction, such as
Expedition Everest, you can head right to the attraction page and it will offer this information. This will be especially helpful for new or coming attractions such as
Avatar Flight of Passage. You can see on the attraction pages that both of these rides require that guests be at least 44 inches tall to ride.
I hope that this information is helpful for you, Carole! Please do let us know if you have any further questions.