Answer:
I am as hard as metal, yet as flimsy as glass. I shine like a star, yet I am only a rock. What am I?
If you lose me, you may cause people around you to lose me too. What am I?
I fly forever Rest never.
I can't go left, I can't go right. I am forever stuck in a building over three stories high. What am I?
One simple click, one simple flash. A piece of memory, for years I'll last. What am I?
What made Cyclops quit teaching?