Welcome back, Melissa!
Thank you so much for sending us your question. Having vacationed numerous times when my three children were littles ones, I understand the importance of creating a plan for what attractions they can and cannot ride.
For your ride into the Briar Patch on
Splash Mountain at Magic Kingdom Park, your little ones will need to be at least 40 inches tall. The attraction itself can hold two people in each row, with each log containing four rows. As for restraints, this attraction offers lap bars. However, should your children not reach the height requirement, you can always take advantage of the
Rider Switch Service available.
When you're ready to check-in at Disney's Hollywood Studios for your journey into the 5th dimension on
The Twilight Zone Tower of Terror™, guests need to be at least 48 inches tall for this ultimate thrill ride. This attraction includes individual seat belts and a "grab bar" in the row in front.
I hope this helps, Melissa! Please let us know if you should have any additional questions. We are here to help you navigate which attractions will best suit your family's needs while vacation at Walt Disney World® Resort.
Faith