Last time we had a snow day, I did this lesson with my kids, and it went over really well. I decided to do the same thing this year, with a holiday twist! I always start this lesson by giving the kids a sheet of 8.5x11 paper that I've drawn a border around. I find the border just gives them a good foundation in which to put their doodles. I could have them draw these themselves, but some kids would stress over the straightness, etc., of the lines (OBVIOUSLY not something I'm worried about!) and it's just simpler to get on to the actual doodles!
Once we've filled up the entire page with doodles, students drew a holiday or winter related object over top of their doodles, and colored in only inside of the drawing. We had about an hour of time today, and most kids were either finished the doodle part, or almost done. I'll post more as they finish!
Here's some closeup details from the drawings: