Hang this on your "holiday" tree between your Flying Spaghetti Monster and your Darwin Fish! Or thread a chain through it and wear it to town. Or use it as a spray paint stencil. The Happy Humanist is there for you!
The underside of the rounded edge on the first version didn't print real well for me, with the outer shell dropping past the layer below. Maybe scale up or down a titch?
I revised the file to reduce the rounded edges.