I would think you could just buy a sheet of sticker paper from office depot or something and print out whatever you want on it. Just takes a good hand to cut it out if you can’t get a clear sheet or mind having a white rectangular border.
also, other random winter ideas:
- a christmas tree farm, with a bunch of cars leaving with trees shodily strapped to roof tops. (anyone have a huge supply of trees??)
- lowell sphere snowmen.