Answer:
It weighs next to nothing but no one can hold it for long. What is it?
What hatches without food?
What has one head, one foot, and four legs?
What goes trough your head but you forget it like 3 days after?
You are owed one of these when someone wrongs you
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.