What is a spinner ring, you ask?
There are two models for each design, one with a blank back, and one with a 3mm post. The ones with a blank back are so that you can glue a magnet or a pin backing on there, whereas the 3mm post ones are for inserting into a spinner ring such as this one.
https://www.aliexpress.us/item/3256804546451098.html?
Most of the designs are too intricate and will have to be printed with a resin printer. The exception is the Basic Codebug one, which was designed specifically to be printed with FDM and a 0.4mm nozzle.
More details can be found on the github page
https://github.com/RettiSeti/EllieMiniRing
The author marked this model as their own original creation.