When he was just 14 years old, Malawian inventor William Kamkwamba built his family an electricity-generating windmill from spare parts, working from rough plans he found in a library book.
Also see the book:
The Boy Who Harnessed the Wind: Creating Currents of Electricty and Hope
by William Kamkwamba
Buy the Book from Solaripedia Bookstore Catgeory: Envirotorial