games2girls.com
idress-up.com which are dress-up sites, or you can try chat rooms like knuddels.com or teenagechatrooms.com, these places(or at least teenagechatrooms) are supervised by mods that are at least 18 years of age, which means your son/daughter should be safe. Chat rooms are a great way for your child to interact and meet people from other countries, so long as they do not give away personal information such as their name, where they live, or their cell phone number.
girlgames.com poptropica(poptropica is for boys and girls but really fun) pixie hollow free realms(boys and girls) wizard101(boys and girls)
There are many websites that are safe and fun websites for kids. This includes www.disney.com, and www.nickelodeon.com. These sites allow kids to play games, and participate in interactive learning.
http://www.spankwire.com http://www.redtube.com Have fun :)
http://cutegirlshairstyles.blogspot.com/
if you are saying what is a preteen website, I don't know how to explain it. But if you are saying what are fun sites for preteens,i know plenty.the one i go on most often is Fantage.com its so fun!I go on clubpenguin.com somtimes,but it isn't as fun...there's also FooPets.com,and you have to be 13 to play.but a lot of people lie about age(like,about being underage)What you do is feed animals and play games and play with the pets(sooo cute btw)sometimes i go on Neopets.com too again not as fun as Fantage.com...i know more but they're NO fun.any way i hope this helps a bunch. but keep in mind,some of the sites may require $$$ to be THE MOST enjoyable(tht is mostly clubpenguin.com)
Some fun kids sites include the following: bearville. disney channel, poptropica, and club penguin.
miniplanet is fun c:
Kidsareus.org is a very good site for kids to do a bunch of different subjects while having interactive games that help them learn at the same time have fun
redtube.com
Pottermore and muggle net interactive
Alot of help. The beginning of puberty is not fun, and preteens start to get a emotional and stuff.
www.stardoll.com and www.britchicks.co.uk are fun and you can spend hours on each!