I made a working 1:12 scale fan

Banana for scale - this version uses a magnetic power connector at the bottom, but one could plug it into a (dollhouse) wall outlet provided the voltage was stepped down to 1.5v.

All 3D printed except for the motor of course - this particular fan would have had plastic front/back grilles, but I haven’t been able to figure out how to make a metal frame at this size.