How These Teen Sisters Make $20 Million a YearDa Bomb Bath started as a hobby when Caroline and Isabel Bercaw were in middle school. Six years later, their products are sold nationwide.

Caroline and Isabel Bercaw were onceobsessedwith bath bombs. This was back in their middle school days, when their peers were equally obsessed with the bombs -- powdery, fist-size balls that, when dropped in a tub, release an eruption of fragrance and color and fizz. And because the Bercaw sisters were student athletes, they'd spend a lot of time soaking after practice to soothe their sore muscles. Which meant even more time with bath bombs.

And that led to a giant mess.