How do you smuggle your Game Boy into class and play with it? Why, you cram it into a calculator casing, of course! Granted it’s not the most refined mod out there, but you have to admit that having your trusty old Game Boy in a calculator is pretty cool. Of course, you might have a little trouble during math class where you’re a calculator down, but the Game Boy is more important and cool, right? This mod took about 13 hours, though you might suspect that its creator was busy playing Game Boy games while fiddling with the mod. Check out a video of it in action here.