Imprecise Timing Devices
Recently, I discovered the Sensor Watch project. The Sensor Watch is replacement board for the Casio F91-W watch. The great thing about it is that it's programmable, and an open source firmware is available.
My first idea was to build the Casiopeia Watch. The Casiopeia Watch is a custom watch face that instead of displaying the current time, displays quotes from the novel Momo. Besides being one of my favorite books, time is one of the main themes of the book. One of the characters, Kassiopeia - a turtle - can't speak instead her responses appear as text messages on her outer shell. I collected all of Kassiopeia's messages from the book, and the watch displays one, randomly chosen, message for 15 minutes.
You can find the source code for the watch on Github.