Answer:
What is black when it's clean and white when it's dirty?
Lighter than what I am made of, more of me is hidden than is seen. What am I?
I jump when I walk and sit when I stand. What am I?
The more you take away the bigger I get. What am I?
What can travel all around the world without leaving its corner?
The answer I give is yes, but what I mean is no. What was the question?