I was catching up on my podcasts coming home from the farmer's market today and came across an episode of This American Life from a few weeks back.
I don't know if you listen to or are familiar with the format of the show, but it's basically this: the producers select a theme and stories are found to show different aspects of it. Sometimes uniquely American, sometimes universal.
This one's theme was "Kid Logic". From the show's website, it's described this way:
Stories of kids using perfectly logical arguments, and arriving at perfectly wrong conclusions.
Here's the precis of the show's prologue:
Ira talks with Rebecca, who, using perfectly valid evidence, arrived at the perfectly incorrect conclusion that her neighbor, Ronnie Loeberfeld, was the tooth fairy.