One of the recurring themes you find when you interview thousands of entrepreneurs is that many of them started as little kids. Years ago you'd hear stories about paper routes and selling t-shirts; more recently you hear about kids who become web developers or power sellers on eBay.

Here are seven such kids whose stories are both inspiring and kinda amazing--and who frankly represent hundreds or even thousands of others just like them.

These are kid entrepreneurs who launched businesses and even turned profits and hired employees before they were old enough to drive--in some cases, before they were old enough to see a rated PG-13 movie.

At 7 years old, Martinez has already spent two years working on his company, Are You Kidding, which sells specialty socks. 

 "We have been able to already reach the $15,000 that we made last year and are on track to double and hopefully triple our sales this year," his mother Rachel Martinez (the company president) told CNBC.

Now 11, Born developed a three-legged drinking cup, intending that people who have Parkinson's disease (like her grandfather) could use it without worrying about spilling. She raised a little over $6,000 on Kickstarter to put it into production.

"This campaign is not just about bringing a product to production," Lily's father wrote. " it is about sending a message to every parent and every kid with an invention (which is just about every kid) that ... dream can be made real."

One of the youngest entrepreneurs ever to appear on Shark Tank, Kelly got Barbara Corcoran to invest $25,000 in his dog treats business, Ryan's Barkery. As of this writing, at least the website is still live.

"I always loved business," Ryan says, "I had lemonade stands, sold Halloween candy on the bus, I even rented my sneakers to my brother once! I got the idea for the dog treats when we got our dog, Barkley."

At 4 years old, Mikaila was stung by bees twice, and as she grew older they became a subject she would often research. Now she's selling lemonade to raise money to combat the extinction of honeybees.

"I found out how incredibly important pollinators they are, and that they were dying," Mikaila said. "And I decided to create a product that helped save the bees."

Moziah Bridges has made about $165,000 designing bow ties that his mom--the company's chief executive and salesperson--sews and sells. 

"We're like fire and ice," he says of working with his mother. "But at the end of the day, we come up with a good solution."

Nay's first iPhone game, Bubble Ball, required him to write 4,000 lines of code and was downloaded more than two million times within two weeks of its launch. The game knocked the monster hit ''Angry Birds'' out of the number 1 most downloaded free game spot in the Apple app store.

His startup costs: $1,200 form his parents to buy a new Macbook and software licenses.

Four years ago, starting with $10 that his parents gave him, Acidwalla, who lives in India, built an online community devoted to aviation and aero-modeling. He sold it for $1,200 to a fan. Then he took part of his profit and launched an app development company that now employs 42 people.

''Taking initiative is the most important step, so long as it is backed by hard work and dedication,'' he told CNN.