Answer:
What has a head, a tail, is brown, and has no legs?
What goes up and down the stairs without moving?
What can run but never walks, has a mouth but never talks, has a head but never weeps, has a bed but never sleeps?
What is it that you ought to keep after you have given it to someone else?
What gets colder as it warms up?
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.