Even the most precocious child probably does not have anything on Kelvin Doe. This 15-year-old wunderkind from Sierra Leone has built generators, batteries, and FM radios using parts he found in the trash. He takes things that would otherwise have been thrown out and, with almost no formal training, turns them into useful products.

Kelvin Doe's inventions are especially valuable in his home country of Sierra Leone, where, according to Kelvin, the lights there only turn on “about once a week.” Kelvin builds batteries and generators to provide electricity for his family. He also uses his FM radio and self-made mixer and amplifier to run a successful radio station, where he is known as DJ Focus. Kelvin says he hopes to use his radio station as a way for the youth in Sierra Leone to debate about issues in their area. He says he plans to build a windmill to provide more stable electricity for his town.

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