Hi Sheryl,
I bet you are beyond ecstatic about your upcoming trip to Walt Disney World in December. Let the pixie dusted fun begin!
For your third day within the resort, you really can't go wrong with any park. Each one will offer something magical for your little princesses. If I had to pick just one park for one day, I would suggest taking your girls to Disney's Hollywood Studios. They would enjoy multiple rides on Toy Story Mania, intergalactic adventures on Star Tours, and all of the amazing stage shows! My 4 year old girl just loves The Voyage of the Little Mermaid show, and our whole family always makes time to view
Indiana Jones Epic Stunt Spectacular! There is just so much to do and see within Disney's Hollywood Studios, for guests of all ages! The upcoming holiday season will just enhance the amount of fun you all will have, since the park will be decorated accordingly. You just can't beat the holidays at Walt Disney World.
I hope this answers your question, Sheryl. If you have any more questions before your December vacation, please feel free to ask us at any time.
Have a fantastical Disney day!