Kelvin Doe is only 15, but he's already a whiz at engineering. Check out a short documentary about Kelvin above, created by the YouTube channel THNKR.

With minimal training, the young man from Sierra Leone has figured out how to build his own batteries to power lights in people's houses, and put together electrical generators to provide electricity to his radio station.

Oh yeah, he has a radio station. He built the FM transmitter himself.

And why would a 15-year-old need a radio station?

Well, Kelvin is also a big fan of spinning tunes and speaking on-air - he goes by the name DJ Focus.

Finding new ways of generating electricity is an important project in Sierra Leone.

In the documentary, Kelvin says the power only comes on about once a week in the village where he lives, so his home made batteries are a big help to people there.

And what's Kelvin's next project? He's hoping to build a windmill that will provide a sustainable source of electricity for his community.

Those are a lot of accomplishments for someone so young. And you can add a visit to MIT (the Massachusetts Institute of Technology) to the list.

Recently, Kelvin became the youngest person ever invited to the "Visiting Practitioner's Program" at MIT in Boston.

He was brought over by David Senegh, a Ph. D. student at the MIT Media Lab.

Senegh met Kelvin at an innovation camp he runs in Sierra Leone. Kelvin's team applied to the camp with the idea for Kelvin's FM radio station.

Kelvin built the station, which has a big following in his community. In fact, most of the people there know him as DJ Focus.

Senegh sees Kelvin, and those like him, as an important part of the future of Sierra Leone and other countries in Africa.

"For quite many years, Sierra Leone and many other African countries received aid," says Sengeh. "But it does not necessarily get us anywhere. We are not looking into the future, we are not designing our own future.

"Unless we have a host of young people who can think at any given point, that here's a challenge, here's a problem, but it's an opportunity to solve it, there won't be a stable growth in national development."

While he was in the U.S., Kelvin got the chance to work with some engineers at MIT, and even sat down with the president of Harvard for a chat.

But if you're worried he might be lured to the U.S., it doesn't seem too likely: he's not a fan of the food in North America.

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