The detail that caught me off guard is the front grille: a pink safety guard with two curved, ear-shaped loops, sitting in front of a three-blade pink impeller. A guard that protects curious fingers while looking playful at the same time seems like a really charming design choice.
The story behind it is just as good. The original fan belonged to the maker's daughter, was built out of cardboard, and had broken. After confirming the salvaged motor still worked, the maker designed a complete new body in Fusion 360 and printed the parts on a Prusa i3 MK3S+. The old switch and a 2x AA battery pack were reused too, which I think is a nice bit of thrift.
The details that stand out: the handle is off-white with a honeycomb cutout pattern and a slide switch marked ON and OFF. Brass threaded heat-set inserts were melted into the casing, and small screws fasten the frame and secure the motor hub assembly. Assembly called for a soldering iron, tweezers, screwdriver, wire strippers and pliers, with the motor and battery wiring soldered, trimmed and routed inside the housing.
Airflow was demonstrated against a thin foam strip, and the finished fan was shown running on a car dashboard and hanging on a workshop rail. The maker called the build a big success. One part remains original, though: the cardboard blade was kept out of safety concerns around a young child, and there was no time to model a printed blade and shaft coupler. The maker has said more will follow once a propeller prints successfully.
Project by KOKENSHA TECH. Watch it on their YouTube channel: