How old are you? Have you created anything useful? Do you know Kelvin Doe? Let me tell you something about him.
Kelvin Doe is an African boy. Though he is very clever, his family is so poor that he can't go to school. When most teenagers are learning how to solve maths problems, Kelvin Doe is teaching himself to make batteries and generators (发电机) for his neighbourhood. Kelvin is only 22 years old, but has already created batteries and generators by himself. He used things he picked up around the house or from rubbish boxes to create them.
"In my home town, we don't have much electricity and batteries are expensive," Kelvin said. So he decided to make batteries to light up people's homes. Kelvin also owns a radio station. He broadcasts news and plays music for the local people. The station gets its electricity from a generator also made by himself, He wants to help more families in his home town live a happy and comfortable life.
