One of the odder things I remember from high school (40+ years ago) is the tile floor of hexagons in the bathroom. There is something fascinating with the way hexagons fill the plane.
Have you ever wanted to print text upside down? There is, or course, software the lets you rotate text, but another way is to use an upside-down font like UpsidedownTOC.
Notice that to use it to get upside-down printing, you must type in the words backwards.