1.  If I like it, it's mine.
2.  If it's in my hand, it's mine.
3.  If I can take it from you, it's mine.
4.  If I had it a little while ago, it's mine.
5.  If it's mine, it must never appear to be yours in any way.
6.  If I'm doing or building something, all the pieces are mine.
7.  If it looks just like mine, it's mine.
8.  If I think it's mine, it's mine.

If you have a child below 5 you should read this article from NYTimes - http://tinyurl.com/2pkmvm.
It describes the protective fainting reflex in children, something which most parents are not aware of.

Me and Viki spent 3 days with his great-grandma, in a tiny village in north-west Bulgaria where she lives. Viki had the time of his life, being allowed to do virtually anything, for as long as he wants. He even managed to fall into a canal, well, a pool of mud really, and scrambled up himself on all-fours before Daddy noticed what's going on .

The trip to Viki's great-grandma failed. She has the flu and I am not going to take any chances... Now I have to think of someplace else to go during the weekend. Let's hope the weather stays good.