There aren't very many pages on this manga series (one of the reasons I made this page ^_^) but here are the few I have found. Most of these are in Japanese, sorry!
Fun Fun Factory!! (Japanese) This page has some CUTE fanart!
Watnabe Yoshitomo (Japanese) - This is Hakuensha's official page about the manga artist. Not a whole lot here though.
"Fun Fun Factory" is ©Watanabe Yoshitomo and Hakuensha. All images on this site are by Watanabe Yoshitomo unless otherwise noted.