13 Hilarious Inventions We Can't Believe Exist, And Are Real Businesses

Some inventions address needs that everyone has and go on to change the world. The Internet serves our constant craving for information; the internal combustion engine let anyone efficiently do mechanical work with little physical effort; antibiotics significantly reduced mortality rates around the world. Then there are the inventions that are the result of someone asking, "Hmm, I wonder if that would be a good idea?" From a "onesie" that lets your baby mop your floors to a mic-shaped sponge for...