Answer:
A king wears one on his head.
In the sun it likes to play; In the rain it goes away; Walk or run it always follows; In the mud it always wallows.
What must you give before you can keep it?
What is the ending of all that begins?
These are believed to be found at the end of rainbows
I repeat only the last word you say. The more I repeat, the softer I got. I cannot be seen but can be heard. What am I?