Answer:
Use me to reward good behavior.
You throw away my outside, you cook my inside. Then you eat my outside and you throw away my inside. What am I?
My full powers come when my makers are dead. I await a heavy hat to put on my head. What am I?
In a tunnel of darkness lies a beast or iron. It can only attack when pulled back. What is it?
I am used for light yet I am solid. Without me you would feel enclosed. I hate being touched especially with a lot of force. I like to be in buildings.
No matter how little or how much you use me, you change me every month.