Answer:
I transfer oxygen from the atmosphere to your blood
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.
I am milky white and scares people.
I fly when I'm on and float coming off.
I am lighter than air but a hundred people cannot lift me. Careful! I am fragile!
What do you call a skeleton that makes you laugh and giggle when youβre sad?