Answer:
What can point in every direction but can't reach the destination by itself
When one does not know what it is, then it is something; but when one knows what it is, then it is nothing.
A metal snake that runs on tracks.
They say each one is totally unique
Never swallowed but certainly chewed, tossed in the mouth but it is not food. What is it?
Before I grow I'm small. When I'm old I grow tall. When I die I give a mighty fall.