Answer:
Cold head and feet; Round as a ball; Always turning around itself.
What has keys but no locks, Space but no room, You can enter but you can’t exit.
I'm the source of all emotion, but I'm caged in a white prison.
Take it and you will lose or gain more than all the others.
What has no hands but might knock on your door, and if it does you better open up?
What never gets any wetter no matter how hard it rains?
Easy
Animal
Difficult
Food
Funny
Kids
Logic
What am I?