Answer:
This is in a realm of true and in a realm false, but you experience me as you turn and toss.
Give it food and it will live, give it water and it will die.
What can be heard and caught but never seen?
They try to beat me, they try in vain. And when I win, I end the pain.
What goes in, but never through? I've got some and so do you. We might lend one, or even two, but only if our trust is true.
I'm the source of all emotion but I'm caged in a white prison.
Difficult
Animal
Easy
Food
Funny
Kids
Logic
What am I?