As access to devices has spread, children in poorer families are spending considerably more time than children from more well-off families using their television and gadgets to watch shows and videos, play games and connect on social networking sites, studies show. This growing time-wasting gap, policy makers and researchers say, is more a reflection of the ability of parents to monitor and limit how children use technology than of access to it.
http://www.nytimes.com/2012/05/30/us/new-digital-divide-seen-in-wasting-time-online.html