The Embassy Festival of Trees, in Fort Wayne, Ind., features a new attraction this year: a tree powered by, possibly, you. The alternative-energy tree won't be sucking up electricity from Indiana Michigan's power grid. Rather, visitors to the Festival of Trees will be allowed to hop on a bike connected to a generator and pedal away. The generator creates energy that goes into a power pack that lights the tree. Because the power pack can store energy, the strand of lights will stay on for a while even when no one is pedaling. When the power starts running low, an alarm will sound indicating it's time to start pedaling again. Read more.