The name tag is basically a Raspberry Pi (Model B to be specific) with a Pi-Lite being powered by a battery extender, and a glowing USB cable.
I ran the Pi 'headless' (i.e. without a monitor or keyboard). To start off the python script I had to ssh into the Pi from my Macbook Pro using an ethernet cable (DadHacker link).
The actual script I used was a modified version (read cut down to just one string) of this one from Raspberry Pi Spy.