Custom-designed printed circuit board with magnet and coin cell.

Wordbub is about remembering that someone is always thinking about you. This magnetized circuit board lights eight times per hour. If you happen to see the lights glow, you'll be reminded of the individual who gave you the piece. Beautiful right? Turn it on and leave it on, if you know what I mean. It utilizes the deep sleep of an ATtiny microcontroller to last multiple months on a single coin cell.