My teacher uses a Noise Meter similar to this one. The Noise Meter is a cool way to remind students the correct noise level that they should be using! You just use the paper clip and move it to the appropriate noise level the students should be using.
Idea for Brownie Dance Badge: For a "surprise" movement/dance when you need something to fill time. Would be easy to put in a can and have a student pick one out. Use rhythm patterns for student to clap, or sing intervals, or name tempo markings, etc.