Brothers & Sisters

What is it between brothers and sisters that they want to drive each other crazy?  My son is 10 years old and my daughter is 9 years old.  All they do when they are around one another is argue and tell on one another for everything. They have some major sibling rivalry going on. It is a constant competition for everything. My son loves to do things to make his sister mad and my daughter loves telling on her brother for EVERYTHING. God help us when there is a friend over, because then it's double trouble. It has gotten so bad over summer vacation they can barely be in the same room together to watch television.  Yesterday, my son had a friend over and thought he was being funny by running his little spy car around and spying on everyone. My daughter put a crayon box on the floor to keep the car from coming in the room and he pushed it out of the way with the car. They were arguing over who was going to put the crayon box back. Now, is she wants to block the car from coming in the room, you would think she would get up and put the box back. No, she comes upstairs to say his crayon box is on the floor and he won't pick it up. Okay, so I'm thinking he left his crayon box on the floor. That's not what happened at all. I'm surprised the babysitter doesn't quit on me. Two more weeks.... am I going to make it?