Answer:
Come up and let us go. Go down and here we stay.
Different lights do make me strange, thus into different sizes I will change
You can hold it without using your hands or arms. What is it?
Who makes it, has no need of it. Who buys it, has no use for it. Who uses it can neither see nor feel it. What is it?
My first is in fish but no in snail. My second is in rabbit but no in tail. My third is in up but not in down. My fourth is in tiara but not in crown. My fifth is in tree you plainly see. My whole a food for you and me.
The warmer I am the fresher I am.