Answer:
Talks like this, a green wise man does. Guess my clue, you will.
In marble halls as white as milk, lined with a skin as soft as silk. Within a fountain crystal-clear. A golden apple doth appear. No doors there are to this stronghold, yet thieves break in and steal the gold.
What word looks the same upside down and backwards?
My head bobs lazily in the sun. You think I'm cute. For my face is yellow my hair is white and my body is green.
This only turns over once you have travelled very far. What is it?
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?