Last year I found two wonderful seasonal activity songs from Bananas in Pajamas: "Bumping and a Jumping" CD, which is out of print but you can find it used on Amazon, Ebay, CD Universe or perhaps your library.
The kids really enjoyed these last year, so I am looking forward to using them again.
"Walking in the Snow" is a perfect circle movement song, we just move around the circle as the song directs: walking, marching, skipping, running (not too fast!) sliding, slipping, and finally falling & sitting in the snow. Just silly enough.
"Skating" is a descriptive song in a waltz rhythm that I like to use for scarf dancing time. Lyrics like "Swishing, twirling and turning" help give some direction, but generally I use this is a free style creative movement piece. Here is a short sample of this song on track 4.
And of course, we must do "The Freeze". I like Wee Sing's recording. Everyone loves this dance.