Answer:
One simple click, one simple flash. A piece of memory, for years I'll last. What am I?
Deep, deep, do they go. Spreading out as they go. Never needing any air. They are sometimes as fine as hair.
Glittering points that downward thrust. Sparkling spears that never rust.
Soft, hairy, from door to door. I am the pet that always stays on the floor. What am I?
What building has the most stories?
What an fill a room but takes up no space?