Answer:
What is used by man, tossed by trees, everywhere but unseen?
What 4-letter word can be written forward, backward or upside down, and can still be read from left to right?
I'm a small ring shaped fried cake, often with bavarian cream or fruit filling, and sometimes covered in icing and sprinkles.
What do you have in December that you don't have in any other month?
You are on an electric train. Which direction will the smoke fly in?
Though not a plant, has leaves. Though not a beast, has spine. Though many wouldn't need this thing, It's more valuable than wine.