What's scarier than a robot coming towards you? A robot equipped with a paintball turret. Sure, a robot equipped with a machine gun would be even scarier than that, but let's be reasonable here.
This paintball-equipped bot is available as a kit, if you want to try building one for yourself. It's the perfect gift for your nerdy kid who is too meek, or, alternately, your violent kid who you want to get interested in science. It's a win-win!