I rendered a mandelbrot set online and created this Window Decoration 210x210x25 . Images are from an actual completed print.This could be mounted on a window for the light to shine through the mathematics - there is a beauty in fractal design.
You can print it and attach it to a window some suction cups - or my intention is to do something with it with epoxy. What, I don't know yet.
This was printed at 200 degree hot end, 60 degree bed, and Matterhackers Build black PLA, on a Creality Ender 3 Pro. Don't go overboard with the infill. I did. And while it isn't a bad thing 50% gyroid infill on Cura - it probably took twice the time to print than it could have.
If you enjoy math and want to use this as a conversation starter - here it is - Free!