Telchak
Fans of Stargate may recognize this cube.
It's my version of the device made by the Goauld Telchak that was found in a ruined temple in South America by Daniel Jackson and Dr Lee.

I'm going to mount a small battery and white led inside it but for now it sits on top of a 3-AA cell battery pack. I need to change the current limiting resistor to dim the led a bit more.