Answer:
I fill a room but take no space.
I am black within and red without With four corners round about.
I am of several different kinds, but the one you pick doesn't do its job. What am I?
I say everything I hear to others around. Iām not an animal nor part of the human race. I will immediately repeat after you; But only if my tail is in place.
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.
The answer I give is yes, but what I mean is no. What was the question?