Balloon Popping meter: as the children sing well, a leader pulls on the ribbon from behind. If the kids have mastered a song, the balloon makes it to the top, where it is popped. If all the songs are mastered, the kids get tootsie "pops.
how to encourage children to sing louder in any setting (classroom, playgroup, family, etc). the bigger ben's bubblegum gets, the louder they sing! She has TONS of great ideas for Primary Singing Time.