Redcrx - don't you think children are more open-minded and therefore more predisposed to these 'sightings'?
We as adults have had it drummed into us by our own parents that there are no such things as ghosts. Plus, if you do believe in reincarnation, surely kids have a much stronger link with the spirit world because they have only just 'come back' here.
When I lost my bro, I went through a crisis of faith, and ended up buying a book called "Between Death and Life - Conversations with a Spirit" by Dolores Cannon.
She is a regressionist who, one day, accidentally regressed somone to a point where they were 'in between lives'. At first she was too shocked to ask questions, or even realise how she had managed to take the subject back to that point, but after sometime, she began to venture further. What her subjects said about life on 'the other side' and our whole reason for being here was truly awesome.