Answer:
What can elephants make that no other animals can make?
What is black when it is clean and white when it is dirty?
I usually wear a yellow coat. I usually have a dark head. I make marks wherever I go.
They live only in stories, taller than three storeys.
I am something that floats. But after a period of time I fall.
What goes around and around the wood, but never goes into the wood?