There are some pics of the schematics and various documentation after the hop. Unfortunately nothing legible, but you can get a sense of some of what was documented.
YouTube via eecouk | October 11, 2009 via this auction - Sold For: £10.00 "E.T. Drone Home - This is a 4093 synth inside an Interactive E.T. We took out all the insides of E.T. (it was a failed bend), decided to do use the shell of the toy to house one of these drone synths. His chest still lights up, he doesn't move or talk. We added onto his back the following --- Mono mini Jack socket --- On/Off Toggle Switch ---Three potentiometers to control the synth. You can touch the dark part on his chest for some kind of body contact (don't know why this works we haven't connected anything to it?) this only works if you get the knobs at the right points which can be a few minutes work! .fd."
"Just like like the flute...the Theremin IS a heavy metal instrument. (And, No... I don't think i've mastered it yet...and my apologies go out to Iron Maiden)"