Using a CD jewel case, some magnets and a 12-volt air compressor, you can build an elaborate Tesla turbine sharpener for pencils you probably don’t even use. Oh, did I mention it could kill you?

Tesla CEO Elon Musk once claimed that a future Tesla Roadster would receive a “SpaceX” package, with thrusters to assist in acceleration. We haven’t seen hide nor hair of it since. However, YouTuber ...