Over on Hackaday.io, Pierre Muth has documented his build of a Raspberry Pi Zero-based camera that prints photographs on an internal thermal printer. Called the PolaPi-Zero, it uses an Adafruit Nano Thermal Printer and some other parts as well as a 3D-printed case. The case files can be found here and the code for the project is on GitHub. You can read all about the build, and see more photos over on Hackaday. Watch a video of the project here: