While the OLPC Foundation is no stranger to unconventional power sources, a team working in a village near Mumbai now looks to be taking things to a whole new level, with them currently experimenting with a cow-powered generator to keep the laptops charged up. According to OLPC's Arjun Sarwal, the makeshift rig uses a system of belts and pulleys to drive a dynamo taken from an old Fiat, with the cows (which are plentiful in the area) providing all the necessary brute force. Sarwal apparently turned to the cows after after solar, wind, and water power proved to be unfeasible, and a gas-powered motor proved to be too expensive. No word if he also considered that other form of cow power.

[Photo courtesy of Arjun Sarwal]