Answer:
I open to close but I close to open. I'm surrounded by water but I'm never soaking. What am I?
I may be of the eye, in order I am pie. In my center there is a star, I keep medics where they are. What am I?
I am a pretty one, fluttering in the pale blue sky. Delicate, fragile on the wing, indeed I am a pretty thing. What am I?
By Moon or by Sun I shall be found. Yet I am undone if there's no light around.
The most famous dinner
Whoever made me don't want me. Whoever bought me don't need me. Whoever use me don't know me.