Answer:
What is black when you buy it red when you use it and gray when you throw it away?
Use me if you really want to see inside someone
I carry you down a gentle stream.
As a stone inside a tree, I’ll help your words outlive thee. But if you push me as I stand, the more I move the less I am.
I can be short and sometimes hot. When displayed I'm never cold. What am I?
Runs over fields and woods all day. Under the bed at night sits not alone, With long tongue hanging out, Resting at your feet until we go for a walk