Answer:
A nut cracker up in a tree.
My teeth are sharp, my back is straight, to cut things up it is my fate.
I'm tall in the morning and short in the noon. I disappear at night but I will be back soon.
I can be cracked, I can be made. I can be told, I can be played.
What types of words are these: madam, civic, eye, level?
What do angels sing in the shower?