Answer:
I have a little pool with two layers of wall around it. One white and soft and the other dark and hard. What am I?
I run around the streets all day. Under the bed or by the door I sit at night never alone. my tongue hangs out waiting to be fed during the day.
I am constantly overlooked by everyone but everyone has me.
I fly forever Rest never.
The more you add the less it weighs. What is it?
It has no top or bottom, but it can hold flesh, bones, and blood all at the same time.