This is such a fun instrument. After playing with it for a day, I wrapped it up and sent it as a present to my two year old niece, working on the principal that it would be the present I would like to receive as a two year old.
It doesn't require too much technique to elicit an almighty sound usually reserved for modular synth demos on YouTube.
The icing on the confection is the delay, waving your hands around and employing the delay feedback control is about as much fun as you can have with your nappy on.
Loud enough to annoy any indulgent parent, yet subtle enough to summon a guardian angel. Close your eyes, take a deep breath, relax your body, switch on the Dübreq Stylophone Theremin and open your mind.