I'm really interested to see the advice in this thread - because I am up several times in the night bfing, I have been playing iphone games or reading ebooks to keep me awake while DS feeds. But I've found that I often can't drop back to sleep afterwards, and have been wondering if there's something in the screen lights that affect my sleepiness. If I read a real paper book, I can usually drop off much more quickly again.

So if screen time affects me, an adult, that much, I can imagine how tv and ipad before bed/in bed might affect a 4 year old!