There comes that moment, as a parent, when you have to explain to your children why bad things happen in the world. It's painful in the world and it's not fair and it's not ordered. What kids want most in the world, is for things to be fair. The first thing I tell my children is, instead of saying "why?" say, "What?" "What now? What to we do now that this bad thing has happened?" There is a great anecdote from Jewish tradition, in which a man turns to God in terrible pain and says, "God, why is there all this anguish and suffering, why didn't you send help?" God looks at this man, and responds, "I sent you." When there are bad things that happen in the world, remind your children that they are the instrument to bring good in the world. They are the ones that can change the world from being a place where there is bad, to being a place to being where there is more good. Then they will understand more fairness.