Answer:
I go up, let out a load and then go back down. What am I?
My teeth are sharp my back is straight to cut things up it is my fate.
I am a tool for fairies.
I am bought by the yard but worn by the foot. What am I?
I can't go left, I can't go right. I am forever stuck in a building over three stories high. What am I?
I am rarely touched but often held. If you are smart you'll use me well. What am I?