Answer:
In many hall ways you would stand if not with me in hand.
I go around a yard but does not move.
I'm simple for a few people, but hard for them to hear. I live inside of secrets and bring people's worst fears. What am I?
I am lighter than air, but a hundred people cannot lift me. Careful, I am fragile. What am I?
What kind of room has no doors or windows?
It has no top or bottom, but it can hold flesh, bones, and blood all at the same time.