Answer:
A king wears one on his head.
What has a neck but can't swallow?
They come in many varieties: Red, Black, Dead, and Caspian to name a few.
You are on an electric train. Which direction will the smoke fly in?
If you have me, you want to tell me. If you tell me, you don't have me.
I always murmur but never talk. Always run but never walk. I have a bed but never sleep, have a mouth but never speak. What am I?