Children's Art: Free paintings

Friedrich decided not to work on black but the usual white paper we have.
He made these three paintings yesterday in short time and I like them a lot, because they are so free and loose. And he named them immediately.

"Heavy weather"

 "Mirò's Anger"

"The sad house"
I asked: " Why is the house sad?" His answer: " Because someone (the black one in the lower left corner) is laughing at it."