We went in December with a 2yo, 5yo, and 8yo. It was the greatest! They actually had record lows, like upper 20's, lower 30's at night. But during the day a sweatshirt was plenty warm.
The characters spent forever with the kids. I mean WOW. Cinderella held my ds on her lap for 10 minutes!
There were no lines at all. Which is even more wonderful with preschoolers than it is for the rest of us

The different hands-on things at the ends of rides were deserted, so the kids got to really experiment with some of the stuff that's meant to be a little educational.
Everything is extra beautiful. In ohio we're so careful with pointsettas, wrapping them to leave the store or whatever, and down there they stack them to make big poinsetta "trees". (they had to have worked alot switching out frosted ones early in the morning!)
Another fun thing was sending dh ahead with the kids and slipping back in to shops to buy Christmas presents that they just ohhhed and ahhhed over. (You know you can send stuff back to your resort and pick it up discretely there, not try to carry it and hide it walking) Along these lines, you can get really cool presents for others in the World Showcase.
Go, do it! book it right this instant!
