Answer:
I have a little house in which I live all alone. My house has no doors or windows and if I want to go out I must break through the wall.
I have keys but no locks. I have space but no room. You can enter but can't go outside. What am I?
You throw away my outside, you cook my inside. Then you eat my outside and you throw away my inside. What am I?
I am full of holes but still holds water.
Cold head and feet; round as a ball; always turning around myself.
No matter how little or how much you use me, you change me every month.
What am I?
Animal
Difficult
Easy
Food
Funny
Kids
Logic