How much time is too much time in front of the T.V.?

Tweet

I hear a lot of people saying that kids T.V. viewing should be limited to under two hours a day. It's not that I don't agree with it. I understand its merit. Actually my older kids rarely even turn on the tube. They probably watch about two hours per week. They have other intrests and enjoy reading, and playing like normal kids. My youngest however always wants the T.V. on she is nearly two, and as fast as I turn it off, she turns it back on. I think it may be because she likes the backround noise. Actually, she doesn't sit and watch it. She is just in the room with it...playing. If something pops on...I leave it on a 24 hr. preschool channel... that she enjoys, she calls for me to sit with her and talks about what she sees on the T.V. I feel it has been a good way for her to see the world outside our community, and a great conversation starter. I was wondering how other familys deal with sharing their home with a boob tube?