So basically after you enable the microphone (built in with a laptop or external with a desktop) it detects the noise level (closest to the microphone obviously) and the balls bounce! If students whisper/talk quietly the balls lie nicely at the bottom of the screen, when students talk at a normal level the balls bounce midway up the screen but when it begins getting too loud the balls bounce wildly on the screen (you can adjust the microphone sensitivity). The first thing you MUST do is let the kids do a mini scream or tap or stomp or loud laugh or whatever they want to do otherwise they will do these things randomly just to see the balls bounce. After they got their silliness out this little gem works like a charm! One class even made it into a competition, each time the balls go wild the teachers got a point and every time we checked the screen and the balls were calm the students got a point.
The first graders all the way up through eighth graders love the bouncy balls! Have you used this tool before or something similar? Do you have a noise chart in your room?