I found some info on it here
but will repost what was found:
In one early morning commercial on Nickelodeon, Katara from Avatar: The Last Airbender gives a lecture about swimming safety, and how you should always have an adult around. This is a horribly Broken Aesop considering these are the kids who do everything with the oldest member being fifteen, from world travel, to swimming, to fighting, to completely unpunished insurance fraud. Also Toph farts in the pool.