Ever since I borrowed (then kept) my father's acoustic melodica – as seen at https://en.audiofanzine.com/melodica/hohner/melodica-soprano-9451/ – I've wanted something similar but not-so-acoustic so I can plug in headphones in and casually play without anyone else having to hear. Most melodicas use a mouthpiece on a connecting tube for breath control, but I think I'd prefer the tube so I can play like any other digital keyboard.

So far, everything I can find is:
* woodwind-style keys (or something even less understandable);
* an expensive device to plug into an expensive MIDI device that understands breath control (huge pro-level synths, obscure keytars found only in Japan, or a PC which significantly reduces the pick-up-and-play factor);
* plans for how to assemble one, something I definitely don't have the skill for.

Oh, and a lot of folks saying they want the same thing, all bewildered that nobody seems to make the damn things. *grumble*