Answer:
What is black when it is clean and white when it is dirty?
You are a bus driver. Two kids get on and one kid gets off. Five kids get on and four get off. Nine kids get on another one gets off. What color are the bus drivers eyes?
What speeds on a track but isn't in a race and has a whistle to announce its steady pace?
Snow White was friendly with seven of them
Small and bearded, both in the real world and in stories.
I appear in the morning. But am always there. You can never see me. Though I am everywhere. By night I am gone, though I sometimes never was. Nothing can defeat me. But I am easily gone.