Hi Susan! My daughter was almost three the first time we went to Disney World, and though she doesn't remember it, she sitll loves looking at the pictures of that trip! Since your children are young, you might be heading back to your resort for naps. Given this, I would count on at least two days per park. I would definitely put the Magic Kingdom down for at least two days, maybe even three! Personally, I love the Animal Kingdom, and we spent alot of time there when my daughter was younger. There is so much to see and do, and she loved seeing all the animals. I would say one or two days for that one. Hollywood Studios is great, especially if your kids are fans of
Disney Junior. Now that my daughter is older, we're usually there for two days, but one might give you enough time to get it all in.
Be sure to check out the parades in all the parks. They are so much fun for the kids, where they can their hearts out!
Write us back with any other questions Susan!