Answer:
Something wholly unreal, yet seems real to I. Think my friend, tell me where does it lie?
I usually wear a yellow coat. I usually have a dark head. I make marks wherever I go.
Round like a dishpan and smaller than a bathtub. But the ocean can't fill it. What is it?
My teeth are sharp, my back is straight, to cut things up it is my fate.
It's equally comfortable in an orchestra and a geometry textbook. What is it?
Brings the sky a lot closer.