Answer:
You write on me and secrets I can keep in places never seen. I spin like a top. Though stiff as a board, I'm often described like a mop. What am I?
If you've got me I'm everywhere. If you share me I'm nowhere. What am I?
I go in hard, come out soft. Blow me hard and I'll make a pop. What am I?
What goes through a door but never goes in and never comes out?
What has legs but doesn't walk?
The answer I give is yes, but what I mean is no. What was the question?