How 5 Hobbyists Turned Passions into Million-Dollar Businesses Your passion can get you a paycheck, and this advice can help.

During their annual road trip from northern Italy to Sicily, cousins Joseph and Giuseppe Ferlito developed a ritual: acquiring trinkets from the Mediterranean cities and villages they visited, which they gifted to fellow travelers they met along the way and friends and relatives back home. One novelty from their 2008 trip stood out: a bracelet featuring a simple turtle bead, which a girl they'd met in Sicily had given each of them.

Upon returning home -- Joseph to Lindenhurst, N.Y., and Giuseppe to his in Italy -- the cousins received countless compliments on their turtle bracelets. During their road trip the following year, they tracked down the turtle bracelet vendor and bought dozens more baubles as souvenirs for friends and family. More oohs and ahhs. After repeating this for a couple more years, the lightbulb went on: Perhaps they could monetize this bracelet-sharing concept.

To find out, in summer 2013 the cousins put up $5,000 to design a beaded animal bracelet of their own. The 20,000 bracelets they placed in 100 New York City boutiques and 7-Elevens, priced at $1 to $2 each, sold out in a week. Joseph and his father then invested $150,000 to create 750,000 more bracelets. Within two months, those sold out, too. Trrtlz, as they branded the jewelry, turned into a phenomenon.