Cool, I didn't know about this.

I didn't design it, but I'd like to try:

https://www.thingiverse.com/thing:126567

It's a 3d fractal made using code.

genius

0.2 mm normal in prusaslicer. I scaled the model up 150%, which made some of the overhangs just a little too steep so there are a few small gaps near the top.

Transparent PETG, and it's about 10" tall.

Very true. It's hard getting up and going to work when she's snuggled against my shoulder.