When I walked into my local library and saw their new 3D printer available for patron use, I felt a wave of geeky excitement wash over me. Oh the things I could create—the only limit would be my imagination. Of course, there were likely a few other hurdles such as my (in)ability to model my vision in 3D CAD or the size constraints of the machine, but still, the possibilities! Near infinite possibilities are great, but what specifically would I create first?