Someone handed the following to me written by an anonymous hand.  It's labeled, "The Toddler's Creed."  It reads, "If I want it, it's mine.  If I give it to you and change my mind later, it's mine.  If I can take it away from you, it's mine.  If I had it a little while ago, it's mine.  If it's mine, it will never belong to anyone else, no matter what.  If we are building something together, all the toys they are mine.  If it looks just like mine, it's mine."  Any parent who has ever tried to mediate between siblings, both of whom are shouting, "It's mine!" has to smile.