One small piece of plastic is all Deita_Meira needs to play a little tune we all know and love. Well, except me, because it's my ringtone, and no one calls unless they want something.
You can see that the secret is that the coffee stirrer is segmented, so once he figured out what notes they played, he worked on the pattern of the tune itself. You have to wonder what kind of boring job would lead to such a hobby. (via Tastefully Offensive)