Answer:
I fly when I'm on and float coming off.
Everyone has me except for a few. You may not be able to identify me but I can always identify you. What am I?
I am between earth and heaven. What am I?
Though not a plant I have leaves. though not a beast I have spine. Though many wouldn't need me I am more valuable than wine.
I am needed for most animals and hardcover books
It has no top or bottom, but it can hold flesh, bones, and blood all at the same time.
What am I?
Animal
Difficult
Easy
Food
Funny
Kids
Logic