Coming in September 2008 we are upgrading V to Visible Violin Vibrations!  It's a mechanical oscilloscope -you bow or pluck a real violin while the shadow of the string is projected onto a screen allowing you to see that a bowed string makes sawtooth waves and a plucked string makes sine waves. 

The Visible Videotape Machine was an interesting interactive but less and less people even have one, so we are retiring it.

It’s a cool mechanism that most of us, until now, could not see in action.