Answer:
Pirates put their booty in it.
They try to beat me, they try in vain. And when I win, I end the pain.
A muttered rumble was heard from the pen, and I, in my walking stopped to look in. What was this I saw? A massive beast, hoofed, and jawed. With spikes upon its mighty brow, I watched as he struck the turf and prowled. And yet for all of his magnificence, he couldn't get out of that wooden fence.
A house of wood in a hidden place. Built without nails or glue. High above the earthen ground. It holds pale gems of blue.
Different lights do make me strange, thus into different sizes I will change
Almost everyone needs it, asks for it, gives it. But almost nobody takes it.
Difficult
Animal
Easy
Food
Funny
Kids
Logic
What am I?