I told the kids that I had one more "master sticker" and said that it was the sticker that ruled all the others (or something like that). They could earn this if they were doing a really fantastic job. Then to show them how cool it was, I started to peel off what was left on the sticker sheet... the extra stuff that leaves a "cut out" when you have taken all of the other stickers off. They realized that it was big, had lots of holes in it, and was the length of the sticker sheet. Their eyes widened. I told them that it was going to go to the person who was doing the best, watching really well, and using their singing voice.
The Master Sticker. I'm telling you, folks. It's a beautiful thing. Go and try it out!