At age 10, Maddie Bradshaw took some old bottle caps she got from her uncle, put designs on them, and used magnets to put them on her locker. Her friends soon wanted some as well, and Snap Caps was born. By age 13, she made her first million dollars.
Inspired by the popularity of some drawings she made when she was 10, Juliath Brindak launched missoandfriends.com, a website for tween girls to have fun and get advice on dealing with those awkward middle school years. The company eventually became worth $15 million.
Lizzie Marie Likness first started her culinary business at age 6 to pay for horseback riding lessons. Nine years later, she now has a healthy eating website and her own WebMD series, "Healthy Cooking with Chef Lizzie."
In 1993, at the age of 8, Abbey Fleck created Makin' Bacon, a device that allows you to cook bacon in the microwave by holding the bacon up vertically. Her invention earned her appearances on The Oprah Winfrey Show and Late Show with David Letterman.
In 2011, at age 14, Robert Nay developed Bubble Ball, a physics puzzle game that quickly rose to number one on Apple's app chart. It knocked Angry Birds to number two on the list, making the birds even angrier.
8. Jaden Wheeler and Amaya Selmon, Kool Kidz Sno Konez
Brother and sister Jaden Wheeler and Amaya Selmon loved Sno Cones, but didn't like that it was quite a drive to obtain the tasty treat. So at age 10 and 9 they started Kool Kidz Sno Konez as a stand in front of their house. They soon earned enough money to move from a stand to their own food truck. (Of course, given their age, their mom is the one who does the driving.)
At age 9, Cory Nieves first started selling hot cocoa to try to buy his mom a car. He eventually expanded into cookies, which became the focus of the business. Cory then decided to create a healthier cookie, so he and his mom tested recipes until they came up with a tasty all-natural chocolate chip cookie. The treats became a hit ”” and so did Cory, getting 30,000 followers on Instagram thanks to his hip look.
Ryan Kelly appeared on Shark Tank to pitch his own line of homemade dog treats, Ryan's Barkery. He got a $25,000 investment from one of the Sharks, and the business is still going strong ”” although it now goes by the name Ry's Ruffery.
In 2004 at age 14, Scottish entrepreneur Fraser Doherty took his grandmother's jam recipe, figured out how to make it from 100% fruit, and created SuperJam. A few years later, he became the youngest supplier to a major supermarket chain. Today, SuperJam can be found in stores all over the world.
At age four, after getting stung by a bee (twice!), Mikaila Ulmer became fascinated with the insects. She also got a hold of her grandmother's recipe for flaxseed lemonade. Mikaila then got the idea to sweeten the lemonade with honey, and BeeSweet Lemonade was born. The beverage became a huge success, and she donates a portion of the proceeds to organizations dedicated to saving honeybees.
Kiowa Kavovit was four years old when she came up with the idea of Boo Boo Goo, a kind of painted on Band-Aid. She invented it at age six, and became the youngest inventor to pitch on Shark Tank, getting an investment of $100,000.