Said by children:

The difference between humans and animals is that when pigs are fat you eat them.
(Arvid 6 years old)

The adults can eat as much candy as they want to, stay up for as long as they want to and put on as much makeup as they want to. The terrible thing is that they don't want to.
(Lousie 7 years old)

Mushrooms grows in humid places. That's the reason why they look like umbrellas.
(Henrik 8 years old)