My brother is in the digital signage business. It's easy to just be "one of many" selling such solutions, so as a birthday present I made him something special. Something that people he met would easily remember him and what he did.
This is a container for a 3D printed "Pocket Sign" based on standard products from Adafruit - 1.8" screen, lipo charger, lipo battery and an Arduino Mini. The display works for two hours on a one hour charge and I learned a few new 3DP-tricks while making this.
Read more about the project here: