Hi Glenn!
Disney's Art of Animation Resort is beyond fabulous!
The Big Blue Pool is one of my favorite pools at
Walt Disney World Resort! It's HUGE (in fact, it's the single largest pool at Walt Disney World Resort) and you will love the decor. You will want to take time to walk throughout Disney's Art of Animation Resort! There are so many amazing photo opportunities! It's a great Resort hotel!!!
I confirmed with a Cast Member that while there aren't waterproof sheets, they do have mattress pads available. I can tell you from personal experience, from when my kiddos were toddlers, the mattress pads are phenomenal. In fact, I bought the same brand for my house.
I can also share that, (again from personal experience when traveling with toddlers) there are 24-hour self-service
laundry rooms available if needed. At Disney's Art of Animation Resort, you will find them near The Big Blue Pool, Flippin’ Fins Pool, and Cozy Cone Pool. The laundry rooms are great. You can pay using credit and debit cards for washers, dryers, and soap. The coolest thing, in my opinion, is the ability to request a text message when the laundry cycle is complete. It's fantastic!
Thanks for sharing your question with the Disney Parks Moms Panel! Please let me know if you have any other questions as you plan your magical Walt Disney World Resort vacation!
Kari