Answer:
I am round as an apple, deep as a cup. All the King's horses can't pull me up. What am I?
What can you catch but not throw?
I am often sold by children entrepreneurs in summer time
I go from house to house a messenger small and tight. Whether it rains or snows I sleep outside at night.
My first two letters say my name. My last letter asks a question. What I embrace I destroy.
It flows out of the soil, It burns you if it boils, And holds us in its coils, More valuable than gold, As black as it is old.