Answer:
What three letters change a boy into a man?
I'm a god a planet and a measurer of heat. Who am I?
I can be repeated but rarely in the same way. I can't be changed but can be rewritten. I can be passed down but should not be forgotten.
With a halo of water and a tongue of wood, stone as skin long I stood. What am I?
I am a beverage named after a stick.
I will disappear every time you say my name.