Fractal LED

thingiverse

The 2032 button cell holder is a combination of two models: Sphynx's design on Thingiverse and Petr Broz's "Fractal" shape script on Tinkercad. To print them, separate the pieces and set your slicer to create a one-layer shell for the tall fractal part with base but no roof. Instructions for MakerWare can be found in Day 5 of MakerHome blog. The design is licensed under Creative Commons Attribution Non-Commercial Share Alike, so remember to attribute Mathgrrl if you use it commercially or outside the license terms. You can find Mathgrrl's Twitter, blog, and Shapeways store for more projects.