Hi Julie!
You are in for a treat as Walt Disney World is not your typical theme park. The four parks will offer dozens of attractions suited for the entire family.
The
attractions page on the disneyworld.com website will become a great resource for you to determine the height restrictions on the larger thrill rides. By clicking the provided link, the site will allow you to filter the attractions by height across all four theme parks. If your li'l mouseketeers are at least 35", they'll cherish their first coaster ride above Storybook Circus on the classic Barnstormer starring the "Great Goofini!"
You'll also want to familiarize yourself with Disney's
Rider Switch amenity, offering guests the opportunity to experience the thrill rides with ease. The adults will basically switch spots in line, waiting with your little ones, while the other adult enjoys the ride. Cast Members will be available at the front of the select attractions to assist you with the switch.
I hope my answer was helpful, Julie, and please visit us again with any other questions coming to mind. I'm confident you'll have the most magical vacation!
Best wishes,
Sherri