What’s the coolest invention you can think of? Got one? Right, well – this is cooler. Oh, you’ve thought of another one? Nope! This is still cooler… 3D printing has opened up a world of possibilities for clever inventor types to create the weirdest and wackiest innovations. And where better to look than the homeland of excellent engineering and precision, Germany? So let’s head there now to discover what the coolest thing ever is. Why, it’s the Paper Airplane Machine Gun, of course!