A couple of years ago I used this Popcorn poster as an incentive to refine their songs for the primary program. The idea was to have them get the popcorn into the bucket. When they finally sang the song as well as I had hoped for, I had a child put the song in the bucket. When the bucket was full, we gave them each a popcorn bag filled with popcorn to take home. It was a simple idea that really worked!