Answer:
Whoever makes it, tells it not. Whoever takes it, knows it not. And whoever knows it wants it not
What is the only letter in the alphabet that does not appear anywhere on the periodic table of elements?
I am the greatest teacher out of them all, but alas in the end I kill my pupils.
No matter how little or how much you use me, you change me every month.
I am mother and father, but never birth or nurse. I'm rarely still, but I never wander.
What is so fragile that saying its name breaks it?
Difficult
Animal
Easy
Food
Funny
Kids
Logic
What am I?