This is one part of the over all Ball Fan design.
The Ball Fan is an easy to assemble desk fan. A simple 4.5V motor, 24mm in diameter, will fit snugly into the back cage, and can be bought from any electronics store.
If you wish to create a custom base, the entire cage is 92mm in diameter.
The design itself is Inspired by U-LIKE’s ‘USB Desktop Fan’, and 11+’s USB-powered ‘O-fan’.