Here's a picture of our Advent calendar:
They're the same paper cups from last year, but hung on a ribbon with mini clothespins instead of hanging from a tree branch (which kept falling over, or dropping the cups on the floor). The ribbon is over the chalkboard so I have to lift the kids up to pull out the paper with the day's activity. Having it placed out of reach also keeps them from taking out all the papers and shuffling them up!
Day 1 - Paper countdown chain
Day 2 - hot chocolate