Hi
Katie! Congratulations on your family's visit to the Walt Disney World Resort!
You've picked a great week to visit! According to the
FAQ page, that is typically a "low attendance" week. You'll also be able to enjoy the theme parks and resorts beautifully decorated for the holidays. In addition to
Mickey's Very Merry Christmas Party, there are several yuletide events taking place during that time of the year. To learn more about them, please read
HERE.
As far as the weather is concerned, we are talking about Florida so it can be unpredictable at times. However, looking at average temperatures for that time of the year, the highs could be in the upper 70s to lower 80s during the day. At night it might get a little chilly with temperature dropping into the upper 40s to lower 50s.
At DisneyQuest Indoor Interactive Theme Park, you'll find something for everyone. Depending on his/her height, your 3 year old won't be able to experience some of the attractions with minimum height requirements. Everyone will be able to enjoy the Animation Academy, Ride the Comix, and Aladdin's Magic Carpet Ride. Please let me know if I can answer any other questions for you.
Enjoy a most magical visit to the Walt Disney World Resort!