Planet Girl is a fun place to visit, and the puzzle area has many jokes and brain teasers. The list of links is extensive, but it is strange that they included MTV, as the target audience is 8-14, and some of the subject matter on the MTV site is inappropriate for this age group. The chat area has moderators, but I don't know how often they check in. Anybody can log in, so if anybody is who he or she says they are is anyone's guess. Girls can write in Pig Latin and choose what color they want to write in while they chat.
Girls can also leave messages for other people.
There are many fun things for young girls to do here, and they may learn something as well.