Answer:
Two in a whole and four in a pair. And six in a trio you see. And eight's a quartet but what you must get. Is the name that fits just one of me?
Round as a button, deep as a well. If you want me to talk, you must first pull my tail.
It's got twists and turns, but has no curves. Twist it to fix it, turn it to ruin it. What is it?
I have four legs but no tail. Usually I am heard only at night.
With head without hair. With mouth without tooth.
What covers its face with its hands, speaks no language, yet most known what it's saying?