Answer:
*forward* *backwards*is what I do all day. I come in all different shapes and sizes. I can be scary and I can calm you down.
Kings and queens may cling to power and the jester's got his call. But as you may discover the common one outranks them all. What am I?
What two keys cannot open any door?
One pace to the north. Two paces to the east. Two paces to the south. Two paces to the west. One pace to the north.
You find me behind the stars; or in a sixth seventh or third. It takes something round a computer and me to make pie. I am bigger than anything you can think of.
Give it food and it will live, give it water and it will die.