Answer:
What surrounds the world, yet dwells within a thimble?
I saw a strange creature. Long, hard, and straight, thrusting into a round, dark opening. Preparing to discharge its load of lives. Puffing and squealing noises accompanied it, then a final screech as it slowed and stopped.
Brown I am and much admired; many horses have I tried; tire a horse and worry a man; tell me this riddle if you can.
Look into my face and I'm everybody. Scratch my back and I'm nobody.
To unravel me you need a simple key, no key that was made by locksmith's hand. But a key that only I will understand.
I can only be played on a windy day
Difficult
Animal
Easy
Food
Funny
Kids
Logic
What am I?