Answer:
I occur twice in eternity. And I'm always within sight.
What has a head and a tail but no body?
What can you easily break but never touch?
What is yours but only used by others?
What has black spots and a white face, is fat not thin, and helps you to win, but tumbles all over the place?
I'm the source of all emotion but I'm caged in a white prison.
Easy
Animal
Difficult
Food
Funny
Kids
Logic
What am I?