Now blowing when you blow on an NES cartridge you’ll be making beautiful music instead of just looking like an idiot. eBay seller nes_harmonica has created these nifty custom NES cartridge harmonicas that you can actually blow into.

From the seller:

Do you remember the old days when your NES wasn’t working and you had to blow into the cartridge like it was a harmonica? Well now you can blow into a real harmonica built into a classic NES cartridge!

This harmonica was constructed by using a Hohner Pocket Pal harmonica and building it into a Legend of Zelda cartridge. As you can see in the picture, this appears to be a standard NES cartridge at first glance. Fool your friends by blowing into it and see the look on their faces when they realize it is a harmonica.

Source: eBay