Answer:
I can be entertaining until you realize some pieces have been lost.
What can fill a room but takes up no space?
I am round as an apple, deep as a cup. All the King's horses can't pull me up. What am I?
I have no voice but I can teach you all there is to know. I have spines and hinges but I am not a door. Once I’ve told you all I cannot tell you more.
I am commonly abbreviated to H
It has no top or bottom, but it can hold flesh, bones, and blood all at the same time.