I've come across a few:

http://twitter.com/preschoolgems - "From the mouths of babes fall gems. I catch them and put them here." 137k followers.

http://twitter.com/ghettohikes - "I'm 28. I have a full time job leading urban kids (of all races) on nature hikes. I simply write down shit they say." 442k followers?!

Check them out and let me know what you think!

Do you have any twitter sites to recommend along these lines?