Answer:
I am whole but incomplete. I have no eyes yet I see. You can see and see right through me. My largest part is one fourth of what I once was.
The more of me there is the less you see.
Use me to reward good behavior.
I belong to everyone. Sometimes make you happy, sometimes make you sad. I will never end until the day you do. What am I?
You can never eat me for breakfast or lunch. What am I?
The answer I give is yes, but what I mean is no. What was the question?
What am I?
Animal
Difficult
Easy
Food
Funny
Kids
Logic