A few weeks ago we discovered how much of an incentive stickers are to get childeren to do things:
"Levi, if you drink that juice, you won't get a sticker!"
Thought process: Hmm, I could drink this juice and enjoy its sweet sugary liquid and get high like its 1975... or I could put it away and get a sticker that will be stuck to a chart so high off the ground that I can't even reach or play with the sticker. Well, if you put it like that... sticker sounds pretty good!"