Pictured here is the pull string power generator for the OLPC. According to the article, pulling the string for one minute gives you an hour of light or 25 minutes of talk time on a cell phone. What a great idea, how about we Americans, as the largest people on the planet, use up our extra poundage into making energy. Let's see, one pound of fat is about 3500 calories; that's about 4 kilowatts. 300 million Americans, maybe 10 pounds overweight each, for a grand total of 12,000 Megawatts! Sounds like plenty.