Answer:
So simple, that I can only point. Yet I guide men all over the world.
I start new then become old. Start clean but be one dirty. I usually start big then become little.
I run up and down the stairs without moving
Four fingers and a thumb, yet flesh and blood I have none. What am I?
I was not born but I am here. I have no name but I am given many. I was made by science and life
What made Cyclops quit teaching?
What am I?
Animal
Difficult
Easy
Food
Funny
Kids
Logic