My Year 4 DD is likely to start noticing news items and documentary programmes on this subject in the lead up to September 11th this time. I think if is important for her to understand what happened, but I do not want to scare her stupid. She is likely to ask in front of her 5 year old sister.
So if you have any advice for me I would appreciate it. I will be going to bed soon as have a three month old too who is wiping me out, so I shall check back tomorrow.