Ok I'm going to rock the boat here and say I for one don't believe it's healthy for them! Too much passive artificial stimulation, it's going to make the wrong parts of the brain grow. I have an older DD and I noticed that when she watches tv in the mornings she is bored and flat and difficult to entertain for the rest of the day. When she doesn't watch it early on, she's off busy with all sorts of self-directed activities. I'm sure incidental watching (ie sitting on your lap while you're looking at Jamie) whilst still interacting normally is fine, just don't be parking the baby in front of the teev to keep them quiet, (IMO).