How could you pitch it. Have you ever seen that brilliant you can make with a couple of balloons and an old plastic drink bottle. If you get a chance check it out. its a brilliant way to show how it all works. I have been singing and teaching for 20 years and i learned something from that little experiment. I’d have kids make that model. I don't know if you have ever seen a video the vocal folds working via larynxoscopy. Pretty fascinating and pretty weird. I can just hear a bunch of kids shouting “gross” They would enjoy it though. the last thing I would get them interested in is the possibility of breaking glass with the voice. Can it really be done. There is so much science right there and huge potential for comedy. I’ll give you a hint, you have to sing a note at the exact frequency the glass vibrates at when you flick it with something or if you wet your finger and rub it around the rim. I think it could be a pretty good incursion. an extraordinary incursion…..