hearing aid in function -- it enables hearing-impaired individuals to get a better listen at the world around them. The difference, however, comes from its source of energy. Through a series of tragic and fortunate events, Howard Weinstein wound up in Africa with a goal in mind: to concoct a hearing aid that even the poorest of citizens could afford. Through a series of grants and help from hordes of deaf individuals that had no qualms holding a soldering iron, some 20,000 folks in 30 countries are currently using the solar-powered devices. Best of all, the mastermind isn't slowing down, as he's looking to expand the nonprofit into the Middle East, China and India in the not-too-distant future.