Answer:
I am round as an apple, deep as a cup. All the King's horses can't pull me up. What am I?
Without a bridle, or a saddle, across a thing I ride a-straddle. And those I ride, by help of me, though almost blind, are made to see. What am I?
What is black when you buy it red when you use it and gray when you throw it away?
What has words but never speaks?
I can go through glass without breaking it.
What language does a billboard speak?