Okay, I've been traveling and I am very tired. One more day of something simple. A creeper face to keep you company on your desk.
STL file: http://www.geekhaus.com/makerhome/day37_creeperdesk.stl
Tinkercad link: https://tinkercad.com/things/54QxllBTrr7-day-37-creeper-desk-ornament
Settings: Afinia .2mm normal in just over an hour.
Technical note: Although a very simple object, it was made in Tinkercad in a weird way that might come in useful later. I started with a 10x10x20 box and used control-D to quickly cut and paste that box into an array of boxes, then deleted the boxes that were not part of the outline I wanted. This gave me a fat outline of the creeper face (see Day 31). Using multiple copies of that fat outline I shrunk the boxes to make a thin outline. So this object is made of 1x10x20 boxes and some 1x1x20 boxes all grouped together.