March 29, 2013 10:44 am Teen Builds Hi-Tech “Helping Hand” A Pennsylvania teenager’s prize-winning science fair experiment could end up changing lives. His “Helping Hand” is a voice-controlled robotic grasper that only responds to its assigned user. US & World Videos 2:38 High Schooler donates 7,000 pounds of homegrown produce to Iowa community 21:18 Jim Gaffigan gives hilarious dad advice to Kelly Clarkson audience 9:45 Orlando Bloom says he's shocked he's still alive after filming his new adventure show 2:45 Boaters face possible punishment for littering in Boca Inlet 2:13 Ryan Gosling talks Emily Blunt's ‘next level' fight scene in ‘The Fall Guy'