Answer:
No matter how little or how much you use me, you change me every month. What am I?
Rotten trees and Jack-O-Lanterns have this characteristic in common.
What is full of holes but still holds water?
What can you hold in your left hand but can never hold in your right hand?
A squiggly line tells you when you've done it wrong
What do you purposefully put lots of in and on your body, but run away from when you encounter it outside?