Etsy seller NESharmonica converts old Nintendo video game cartridges into functional harmonicas:
The NES came out in 1985. I was born in 1983, so I grew up in the NES's heyday. I remember blowing into those games like it was yesterday. To me, reminiscing about the cartridge blow is like a secret handshake. When you meet someone who knows what you are talking about when you mention blowing into a cartridge, you know you have met another classic gamer. That is why I make these harmonicas, it is a way to remember that old gamers ritual while having a good laugh at the same time.
Link via CrunchGear