Quiet Critters - They live in a soundproof jar only come out when it's quiet. They don't like a noisy classroom! During quiet work time you can pop one on each student's desk. If they are noisy you can move the critter to the side of their desk as a warning. If they continue to be noisy, the critter is returned to the jar. At the end of the lesson, whoever still has a critter on their desk can change it over for a sticker, points or other incentive.