Answer:
A hill full, a hole full, yet you cannot catch a bowl full.
Who works when he plays and plays when he works?
who do you think you know but sometimes you don't
Pregnant every time you see her, yet she never will give birth.
At night I come without being fetched. By day I am lost without being stolen.
What is lighter than what it is made of?
Difficult
Animal
Easy
Food
Funny
Kids
Logic
What am I?