When I was child I watched an animation story"Moomins".
I liked it but sometimes I was scared, because of some creatures and an atmosphere.
Moomins started always at 19 o'clock and went on about 30 minutes.
There was a someting special in this animation, what you couldn't find in others stories.
When I grew up I had been forgotten about Moomins.
However after years I started watch it again with my daughter.
She is often scared during watching and jumps on my knees and turns her head away.
However she keeps watching it and it is her one of the best animations.
I recently discovered that everyone episodes contains something what is unnatural and frightening.
For example on first episod found hat changes Moomin in bizzare creature.
I understood that people like be scared sometimes.
Thus we watch horror films, thrillers.
I know now why Moomins achieved success.