my oldest son started watching DVDs when he was 18 months old and I had morning sickness and he insisted on waking up before six. How much they watch now depends on how I feel - a sore head equals more tv. I have just banned computer games because my 3.5 year old has been getting obsessive and they have a very limited range of DVDs. It is quite convenient that ds5.5 is scared of almost everything when it comes to books and tv.