Answer:
What gets broken when you don't hold it?
It weighs next to nothing but no one can hold it for long. What is it?
I am a king but also a common device of measure. What am I?
Soldiers fight it but never changes.
What do you have in December that you don't have in any other month?
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.