Answer:
What has many keys, but can't even open a single door?
It increases and decreases yet no one see it. It is not a fire and yet it can be quenched.
What can never be put in a saucepan?
What do elves do after school?
What did the right eyebrow say to the left eyebrow?
I have feet on my head
Funny
Animal
Difficult
Easy
Food
Kids
Logic
What am I?