"My 4-month-old has a great interest in the television and for that he is only allowed to watch Playhouse Disney in the morning while I talk to him about the shows and help him dance. I tried to stop him but he cranes his head to look at it when it is on. I know we all grew up watching TV and we are fine, but my motherly instinct says that if he is this interested in TV this soon it can't be a good thing. Are there any benefits to watching shows made for preschoolers? Are there any negatives?"
I think it is a good show if the child is interacting with it, singing along, or dancing along. If the child just "zones-out" and stares at the tube, then you should probably find a different show. This is mainly for older infants that have the coordination to respond. At four-months-old, most infants will just stare, and that's fine, plus it gives mom a break.