I still can't get myself to believe the human mind's ability to generate creepy things...
Anyways, what's the "moral of the story" supposed to be? That real creativity consists in some form of macabre insanity?
It's a critique of the effect that little kid shows have on their viewers. The people who made this feel that children's shows teach children to think a certain way (hence why the notebook said green is not a creative color, and poured ink all over the clown painting).
But the video doesn't exactly make creativity look like a good thing... It the point was to say kid's shows don't encourage kids to be creative, the ending seems to imply "...and thank God they don't!".