Answer:
When it comes to me, you go on red and stops on green. What am I?
I begin your sentences. What am I?
I'm the source of all emotion but I'm caged in a white prison.
Everyone has me and no one can lose me. What am I?
What has legs but doesn't walk?
Why is the letter B always cool?
What am I?
Animal
Difficult
Easy
Food
Funny
Kids
Logic