Want to get rich quick? Itâ€™s best to have a blockbuster product. But in case thereâ€™s no flash of inspiration, donâ€™t worry. Thereâ€™s still hope. A few lucky inventors, entrepreneurs, and marketers have hit the jackpot with silly ideas that have just the right combination of humor and utility to move tons of units and bring in piles of revenue. Here are 11 ideas that made the cut, and the cash.