PBS Parents article: By now, most parents have heard about studies that discourage exposing very young children to television. But the reality is that almost three quarters of infants and toddlers are exposed to TV program before they turn 2. So what exactly are the dangers? Are any programs or videos acceptable for infants and toddlers? Studies on TV and toddlers are fairly rare, but children’s media expert Shelley Pasnik has scoured the research to answer parents’ most common questions about young children and television.