This could be a fun way to introduce chord roots with students, while getting a work-out! One of my classmates at the MLT certification course this summer did a similar activity where he tossed two different colored hacky sacks - one was the tonic pitch and the other was dominant -and had the class sing the pitches while he performed the song. Then he added a third unnamed one and juggled, it was a really engaging activity!
Bobby McFerrin Demonstrates the Power of the Pentatonic Scale (via World Science Festival 2009 on Vimeo and @vickytnz)You could do worse things with the next three minutes than watch this.
