Answer:
My first is in fish but no in snail. My second is in rabbit but not 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.
I am a precious stone as clear as diamond. Seek me out while the sun's near the horizon. Though you can walk on water with my power try to keep me and I'll vanish in an hour.
I am a tool for fairies.
I am round. I have only one line. Circle is not my name indeed. What am I?
You are my brother, but I am not your brother. Who am I?
What did the piece of wood say when he saw the screwdriver and screws approaching?