Arduboy, a portable gaming device that plays much the same way as a similar-sounding product that rhymes with "mintendo shmame shmoy," fits in your wallet and/or business card holder. The catch? So far, it can only play Tetris. The bonus? In the decade or so to come, you'll be telling kids, "In my day, we had it so hard, we could only play Tetris on our business cards!"
Because a "catch 'em all" game about pocket monsters called "Ardumon" is in development for this too. It shouldn't be too "ardu" figure out, right?
Check out the Tetris in action...