Answer:
What is easy to get into, but hard to get out of?
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.
My first two letters say my name. My last letter asks a question. What I embrace I destroy.
I am the ultimate killing machine used not once but TWICE I can be made by humans.
I make things short but I am pretty long myself
What made Cyclops quit teaching?
What am I?
Animal
Difficult
Easy
Food
Funny
Kids
Logic