heres some games i play or some that r fun
Zwinky.com
supersecret.com
Roblox.com
freereamls.com
wizard101.com
Gangsternation.net
Sleuth is a fun game. Not for kids but fun for teens.
fun ones
IMVU or Second Life.
It is a fun online system where kids (and teens) can learn how to make games.
Anything that has to do with dating. Trust me I know what I'm talking about.
"Zwinky " is a fun, virtual world that teens can communicate on. You can also create an avatar, design your room, and play fun games.
Code of Everand is a great online game that's fun and free. Check it out, just Google "Code of Everand"
I'm not saying this is the MOST fun website, but I think its fun. The URL is http://thenoodletree.wetpaint.com You can also make your own website using wetpaint. This site has role-playing, games, polls, contests, and you can even submit your artwork, and short stories.
There are many including Runescape, World of Warcraft, and more, although those are the two most popular.
of course imvu a game where you can meet new peeps and have fun rated t for teens only
Ludo and Chess are the best board games for teens.