You could always invite the 15 yr old round to your house to have tea, he could just be lonely, he might have aspergers mildly. But I would feel uncomfortable , I mean there is a difference between wanting to ask to have a 4 yr old to come play with you or just playing with a 4 yr old on visiting. I would want to know and understand why myself.
Invite the boy over to your house and see how they get on, this way you can see them together. X.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.