From the replies, I see that most of your kids start to think abt death at abt 4-5yo?
DS8 went through that phase too. When he was 4yo, he started talking abt it. He became very worried when he knew that he would have to serve the army when he is older. To him, it means he has to go to war and he will die. It affected him so much that no form of explanation can help to alleviate his fear until we had to postpone talking abt the army for awhile. When he had his first nose bleed (also at 4yo), he cried non-stop as he thought he was dying.
Now we talk about death as it is part of life... as in all living things die and we go back to earth.
