Hi Stacey,
Welcome to the Disney Parks Moms Panel and thank you for your question!
First things first, yes, swim diapers can be worn at both Walt Disney World Resort Water Parks.
We finally took our son to his first Walt Disney World Resort Water Park,
Disney’s Blizzard Beach Water Park, on our last trip, which was right before he turned 2. I immediately regretted not having visited one with him before that trip, so I definitely don't think you should wait until your little one is older! My son had a blast splashing around at
Tike’s Peak, a section with all kinds of slides and water features for little ones (and even big kids) to enjoy.
On our next trip, we’re hoping to go to
Ketchakiddee Creek, another section designed especially for toddlers and little ones, at
Disney’s Typhoon Lagoon Water Park so that he can get his splash on even more. I honestly think that, if he had his way, we would spend every morning at a Water Park!!
I hope this helps you plan your upcoming vacation and please don’t hesitate to come back and visit us if you have any more questions.
Have a Magical Day,
Lynne