Answer:
What can be cracked before it's used?
Never ahead, ever behind, yet flying swiftly past, for a child, I last forever, for adults, I'm gone too fast.
What is black and white and red all over?
Cold head and feet; round as a ball; always turning around myself.
Iām grown from darkness but shine with a pale light. Very round I am and always a lady's delight.
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.