Shakespeare's 'The Tempest', about 1610.
Yes, Theramin is a non-contact instrument invented in about 1928 by Leon Theramin, a Russian. 2 hands control amplitude and frequency. BUT, as I was corrected in a previous post, the Theremin was NOT used in Forbidden Planet!
I think he disappeared under mysterious circumstances. Word on the street is he went back to his home planet.
You can buy modern SS versions, as kits, boards, or just schematics. However, even though I am a SS guy, I would prefer the Tube version....for nostalgia if no other reason. It'd look cool in the living room, too. Scare the &^%$ out of the cats!
I have always been told that Disney did the Mattes....Paintings on glass, used to provide the cool backgrounds in many scenes. A lost art courtesy of computer enhanced graphics.