If pediatricians agree that media screen time is not appropriate for children under age two, why are Sesame Workshop and a leading child advocacy organization co-producing a DVD series for babies? “Essentially it is a betrayal of babies and families,” one critic of the new brand of infant media and toy products tells the Washington Post. Child development experts have asked Zero to Three, the advocacy group that’s co-producing the Sesame Beginnings DVD series, to end its association with the Workshop. “We believe that your partnership . . . is exploitative of both babies and parents and severely damages your credibility as an advocate for the health and well-being of young children,” write the leaders of Campaign for a Commercial-Free Childhood, in a March 17 letter.