Answer:
A hole in a pole, though I fill a hole in white. I'm used more by the day, and less by the night.
Power enough to smash ships and crush roofs. Yet it still must fear the sun.
Black we are and much admired. Many seek us if they are tired. We tire the horse, and comfort man, and turn White when we've fulfilled your plan.
Put into a pit, locked beneath a grate, guarded through the night, yet it still goes out.
What surrounds the world, yet dwells within a thimble?
Why was the cook arrested?
Difficult
Animal
Easy
Food
Funny
Kids
Logic
What am I?