Hello Casie and welcome to the Disney Parks Moms Panel!
It sounds like you have raised a trio of fearless daredevils! They will find lots of adrenaline focused attractions at the Walt Disney World Resort including
The Twilight Zone Tower of Terror,
Expedition Everest- Legend of the Forbidden Mountain, and a trio of mountains at the
Magic Kingdom: Space Mountain, Big Thunder Mountain Railroad, and Splash Mountain.
Children need to be at least 7 years old to
ride an attraction without an adult. Therefore, your children will be fine to ride without you. However, you should know that my family calls the door you take to exit the queue because you don't want to ride the "chicken exit." Hopefully, your kids don't hear about, or you will never stop hearing it!
I hope this helps with your planning. If you have more questions, come on back to the Disney Parks Moms Panel. We love to help!
See ya real soon,
Anne