Theres a bunch like, WoozWorld.com,Club Penguin, Mini Clip, Youtube, Kizi, RuneScape, NitroType...And a bunch more AND if u can download Mabey try MineCraft.com
Freerealms.com
habbo, ourworld, imvu
Woozworld teens tweens and kids can joinits fun oh and add me my name is mileyzon make sure to add me on woozworld-peace mileyzon
defenitly it's a fun easy game not hard and u meet lovly people online
miya before and after
There must be some NFL games online, but due to the subject, I doubt they are fun.
miniclip.com has a lot of online games
spark city is a good website because the chatting is safe and also its fun for tweens it's for everyone but recomended for tweens
www.thekidzpage.com give a lot of educational fun free online games for kids. I'm sure they will find it very fun and excited about how many games there are.
Gangsternation.net
there is arcadeprehacks.com
IMVU is similar to Club Penguin, however, it is for older people (tweens, teens, and adults), and requires a download. You can download it at imvu.com.