I think the original NES is one of the best magnets for modders due to its iconic nature. I mean, a good chunk of people from a certain generation grew up with the NES and have fond memories of it. Of course they're going to want to play around with that form! That's why we've seen entire systems crammed into cartridges, Zappers turned into lamps, and even systems stuck in sneakers.

But this, this might be the coolest mod yet. It's an entire NES crammed into a cartridge, complete with screen and buttons. Yes, it's a portable NES in the shape of a cartridge. Sure, you can't plug another cartridge into it to play a different game, but who are you to complain? This is a portable NES that takes the form of a single game cartridge. If you showed this to my 11-year-old self, my brain would have exploded. In a good way.

Ben Heck Forums, via Boing Boing Gadgets