Recently a 3D print pen “happened” to me. I hadn’t actually planned to get one or been particularly aware of the existence of 3D printing pens (beyond a vague notion that there was something like that). However, they offered such a pen at a local supermarket and I was happy to take the chance that “happened” to me.
The Derpy figure sitting in front of the pen among remaining pieces of filament is the first detailed figure I tried. I smoothened the surface a bit with the woodburning tool which I usually use for pyrographies.