Answer:
What has many teeth but can't bite?
What is so delicate that saying its name breaks it?
I'm a word that is not even strange. What am I?
I am taken from a mine and shut in a wooden case from which I am never released. Yet I am used by almost everybody. What am I?
I always run but never walk often murmur but never talk have a bed but never sleep has a mouth but never eat.
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