Hi Mariana!
I'm a toddler mom too, but warning, I'm a classic over-packer. We're gearing up for our son's fourth Walt Disney World Resort visit soon and I think I'm finally starting to get the hang of what we
actually need.
I really do think all four Disney theme parks will be great for your son. There is
always something fun to do at his age including shows, character meet & greets and attractions. There's also so much joy in the simple things like street bands, playing in a splash fountain and taking in fun scenery. Some of our favorites include watching the miniature train display by the Germany Pavilion at Epcot, spotting animals on the Kilimanjaro Safari at Disney's Animal Kingdom, dancing with our favorite pals at Disney Junior - Live on Stage! at Disney's Hollywood Studios, and riding Dumbo the Flying Elephant about a dozen times in Magic Kingdom Park.
As far as what to bring, you'll definitely want a stroller for this age as little legs get tired easily. You're allowed to bring outside food and drinks for picky eaters (this includes spouses) as long as there are no glass containers. And you may even bring the biggest diaper bag you can find filled to the brim with supplies. I like to bring a small bag for just attraction queues that contains a few snacks and distraction items like bubbles or a favorite book. But really you'll need just the basics as Baby Care Centers have every emergency item you could possibly need.
Don't forget that this is your vacation too, so take advantage of the
Rider Switch Service on the more thrilling attractions. I also recommend letting him nap in the stroller while you shop, explore, or enjoy a grown-up snack.
We'll See You Real Soon, Mariana!
~Kristen