You've no doubt connected your digital camera to your computer to download photos or have inserted a little black thumb drive to store or retrieve files. But rejoice - the USB port can be used for so much more, thanks to its ability to suck electricity through your computer, powering some of the world's strangest devices. Following are ten of the cutest, silliest and most useless examples we could find. As a fun game at home, try playing along by suggesting your own examples: You'll be amazed at mankind's capacity for ridiculousness. Oh, how we cry for the poor children.