Tired of losing snowball fights?
Here’s how to make a snowball machine gun that can fire 13 snowballs in half a second.
Inventor Mark Rober studied mechanical engineering in school and ended up working for NASA for almost a decade. He spent seven years working on the Curiosity Rover.
He’s a fan of simple, creative design, so all you really need is some PVC pipe and a leaf-blower.
Rober also provides a how-to guide for building this must- have in any self-respecting uncle’s arsenal.
