A tiny robotic ball able to be controlled by a smartphone doesn't exactly need any more selling points, but Orbotix's Sphero now has an extra one nonetheless. It's been outfitted with a chariot that can be used for FaceTime sessions or low-level surveillance -- or chariot races around your office, naturally. Of course, this is strictly a DIY affair, but we're guessing this is one project you will actually want to do yourself once you see the video after the break.