Stumbled onto this on youtube. Bladeless fan
The person in the video is using that 1/8 Styrofoam core with paper on it(NAMES??!), but I can see this with 1/8 baltic birch or even just cardboard. Maybe for the curved part you could do a living hinge and put a very thin piece of plastic along the inside or out. Or a classic kerf bend might do as I don’t think they make very thin wiggleboard.
The motor is really loud though, anyone have an idea for that?