Apparently they've been on Pinterest when I'm not around. At their creativity table (the dining room table) I find they've created a little something called Snow Puffs.
All you need is a little cardboard paper, markers, cotton balls, and a little bit of glue. The rest is up to you (or your kids).
My oldest made the tree in a snow storm while the youngest went for a simpler version of snow covering an evergreen. They're now discussing making more and turning them into Christmas cards for the rest of the family.