Neil Gershenfeld has been teaching a class called "How to make (almost) anything" to some of the brightest young adults in the United States for years. But it took an eight-year-old girl in a small village in Ghana to show that anyone, anywhere, really can make just about anything. One evening in June 2004 — the day after Gershenfeld had left Ghana having taught a week-long version of his class in the village — little Valentina Kwofie began cobbling together a circuit board.
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