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.
You turn me over after you have travelled far.
What is so delicate that saying its name breaks it?
My head bobs lazily in the sun. You think I'm cute, for my face is yellow, my hair is white and my body is green. What am I?
What is easy to get into but hard to get out of?
No matter how little or how much you use me, you change me every month.