Host Mo Rocca shows us: Incredible innovators under 20 years-old. 19 year-old, Algae Girl, who is pioneering oil producing algae by growing it under her bed. How Thomas Edison's inventions still make us all look like slackers. 16 year-old, Hollow Flashlight Girl, who invented a battery-free Flashlight. And, the 20 year-old from the Netherlands who is skimming the plastics from our oceans.