Bill Nye The Science Guy App for iOS
'Bill Nye The Science Guy® 20th Anniversary App—of Science! Science rules, especially when you grab a seat at The Science Guy's desk and help yourself to heaping handfuls of science. Just scan your thumb to gain entrance to Nye Labs, the most amazing, scientifically fascinating place on Earth (and possibly beyond!). Twenty orbits around the sun and 28 Emmys along the way—now that's something to celebrate!'
This is a free app