TV retards your child’s development

"A 'good' brain for learning develops strong and widespread neural highways that can quickly and efficiently assign different aspects of a task to the most efficient system… Such efficiency is developed only by active practice in thinking and learning which, in turn, builds increasingly stronger connections. A growing suspicion among brain researchers is that excessive television viewing may affect the development of these kinds of connections."
Jane M. Healy, Ph.D, author of Endangered Minds: Why Children Don't Think And What We Can Do About It.