Hi Anne,
Thank you so much for visiting the Disney Parks Moms Panel with your question!
If you are only going to visit one park while at Walt Disney World, I suggest that you make it
Magic Kingdom. This was the first Disney theme park in Florida, and is where the magic all began! It includes the iconic Cinderella Castle, and such classic rides as Dumbo the Flying Elephant and Peter Pan's Flight. My family loves to take in the magic all day at this wonderful theme park. My daughter, and our whole family, love to ride
Big Thunder Mountain Railroad and
Space Mountain!
Also, you can consider bringing your 2-year-old. There is a lot for a young one to do at Magic Kingdom, especially in Fantasyland. Take a look at the Walt Disney World
planning for families with little ones website for great ideas on visiting with a younger child. The little one could even spend part of the day at Magic Kingdom and then head back to the hotel with one parent while the other family members stay. You can take advantage of the wonderful
Baby Care Centers, a place for you to feed, change, and simply take a break with your little one. Also check out
Disney's Rider Switch Service, which would allow you to take turns waiting with the little ones while others experience more thrilling attractions.
I hope that these thoughts are helpful for you, Anne! Please write back if you have any further questions.