Thanks so much for your replies girls! Jsut as I thought he would, he came into our room last night saying that he thought there was a man standing at his window. DH ended up sleeping in his room for a while, but today DS hasn't mentioned it, so over the next few days we will just spend a bit of time making sure he feels ok, and then we will have a talk to him about it - without frightening the living daylights out of him.

Tinks - I was exactly the same as you! We had a policeman come to our school and do a talk. It was around the time of some kidnappings (Mr Baldy/Mr Cruel? Something along those lines in our area) and he absolutely terrified me. 25 years on I still have flash backs of that policeman and what he said

LS - DS is the same as Charlotte. He talks to everyone. He is the kid that will come up to you at the supermarket and ask you why you have toilet paper in your trolley. I love it that he is not shy like me, so I don't want to stop him doing that. And I also realise most of the time the danger doesn't come from 'strangers' but people you actually know, so I really like the ideas in your post.

Thanks again girls for your ideas - will put them into action in a gentle, non-scary way . I like the idea of a book too so I might ask at the library, or get the girls from my old work to find something for me.