Turns out you can't learn Mandarin Chinese by watching television
It is generally accepted that language exposure in the first year of a baby’s life is important. To what certainly must be the dismay of couch potatoes everywhere, researchers at the University of Washington determined that it’s particularly important that it come from a live human being. Watching DVDs doesn’t have any effect. What was particularly notable to the researchers was that even just five hours of exposure made a significant impact.