Answer:
Every night I'm told what to do, and each morning I do what I'm told. But I still don't escape your scold. What am I?
Roast, boast, coast, post. What do you put in a toaster?
I am gentle enough to soothe your skin light enough to fly in the sky and strong enough to crack rocks.
I turn around once. What is out will not get in. I turn around again. What is in will not get out.
I go around a yard but does not move.
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.