just let them get on it it just an email chat room so your kids can chat to people and have more friends it as fun as my space your child could be on their instead of being out their on the street in...
well for starters there is my-space: http://www.myspace.com/
then there are these
www.imvu.com (you are like an avatar)
www.Xanga.com
www.opendiary.com
www.bebo.com
www.livejournal.com