I am not really worried about Aidan's collection of "machine guns". I have bought him, and the other kids, "spud guns", water pistols (including super soakers), cap guns (which I am surprised that you can still get the caps for) and nerf guns. Someone even gave him a "pop gun" for his last birthday and I haven't seen one of those since I was a kid myself.
For a country with such strict gun laws, unlike America, surprisingly the attitude towards guns here is totally different. According to what I've been reading, in some places in America kids have been suspended from school for things like pointing their finger, bent like a gun, at other kids, taking a "bubble gun" to school or even mentioning the word gun or drawing a picture that could be loosely interpreted as being of a gun. So a kid making "guns" out of bits of wood and nails would be an absolute "no-no" in some kindergartens in parts of America, but the teachers are quite encouraging about it. At the kindy one time they asked the parents if they would bring along things for activities for the children. One father brought along two air rifles and set up targets in the yard of the kindy for practise, I helped with making the targets and this was very popular with the kids. It probably wouldn't have worked with the school as some older kid would probably come along and try to be all macho and monopolise the activity.
I still don't know what to make of Aidan. I came into the house yesterday and he was sitting in "the naughty spot" staring ahead. I asked him what he was doing and he said "I made a mess on the floor so I sitting on the naughty spot". No one told him to, he just did. Sure enough there was a pile of sand on the floor
I think the only thing I can do about Aidan's aggressive behaviour is to encourage him to do everything with the other kids so that he feels part of the family. He will be five next year and go to school with the others so that will help, he will be included in all the school "rituals". Andy is drifting away from him more and more now as he wants more of a social life, he doesn't really want a young child, he wants a social life.