VideoScience App for iOS
'A growing library of over 80 hands-on Science lessons that are great for home and the classroom. These short videos demonstrate inexpensive and easy to recreate experiments that are designed to inspire and excite kids of all ages.
VideoScience is hosted by Dan Menelly, a Science Teacher at the UN International School and a 2010 Einstein Fellow with the National Science Foundation in the Office of Cyberinfrastructure.'
This is a free app