Answer:
You can never eat me for breakfast or lunch. What am I?
What can travel around the world while staying in a corner?
I pass before the sun but make no shadow. What am I?
I do not contain flesh feather or scales; yet I have fingers and thumbs.
I have no voice but I can teach you all there is to know. I have spines and hinges but I am not a door. Once I've told you all, I cannot tell you more. What am I?
When is it bad luck to see a black cat?