Answer:
Different lights do make me strange, thus into different sizes I will change
I can be cracked, I can be made. I can be told, I can be played.
It holds most knowledge that has ever been said. But is not the brain, is not the head. To feathers and their masters, it's both bane and boonΒ One empty, and one full.
Without a bridle, or a saddle, across a thing I ride a-straddle. And those I ride, by help of me, though almost blind, are made to see.
People like this usually live in rural areas, unless they are lucky enough to strike oil and move to Beverly Hills.
When is it bad luck to see a black cat?
Difficult
Difficult
Animal
Easy
Food
Funny
Kids
Logic
What am I?