Answer:
I have a mouth on my head and eat everything.
My rings are not worth much, but they do tell my age. What am I?
I go up and down at the same time. Up towards to sky and down towards the ground. What am I?
Soft hairy from door to door. I am the pet that always stays on the floor.
I need to be taken before you can have me. What am I?
I build up castles. I tear down mountains. I make some men blind. I help others to see.