DIY gun folds and shoots paper airplanes
The ability to fold a reasonably functional paper airplane isn't something that everyone possesses. If you're one of those people, then perhaps this is what you need – a device that takes multiple flat pieces of ordinary paper, folds each one into an airplane, then shoots it into the air.
The one-of-a-kind Paper Airplane Machine Gun (or Papierflieger-Maschinenpistole, in its native German) is made mostly from custom 3D-printed parts, along with various components bought in stores or over the internet. The driving mechanism that pulls the sheets of paper through was cannibalized from a cordless screwdriver.
As can be seen in the video below, posted by its anonymous creator, its inner workings consist of a series of rollers and ridged platforms that perform the actual folding and flinging.