Those children are playing an EML-101 synthesizer. (By contrast, Allen Ravestine played an EML-500 series with Pere Ubu). It is a four by-god oscillator synthesizer in which the knobs were deliberately made large and sturdy because it was designed to teach children about electronic music, and was used, to the best of my knowledge, in the Connecticut School System in the 1970s.I have an EML-101 and have played it primarily as a magnificent noise generator because the oscillators aren't all that stable. It's a magnificent beast, even before you add the features in the patch bay.
well said. it's pretty much only good for weird sounds as the oscillators are notoriously untunable. even in the manual, i recall them saying something to effect of, 'sorry buddy, the oscillators aint tunable' :) brillaint looking synth tho