With children spending more time in front of screens than ever, parents sometimes try to convince themselves that playing Angry Birds teaches physics, or that assembling outfits on a shopping app like Polyvore fires creativity.According to a study scheduled for release on Friday, however, less than half the time that children age 2 to 10 spend watching or interacting with electronic screens is with what parents consider “educational” material. Most of that time is from watching television, with mobile devices contributing relatively little educational value.
http://www.nytimes.com/2014/01/24/us/screen-time-study-finds-education-drop-off.html