Second Life is best virtual world for teens.
Ourworld
life
Best online virtual world is Second life.
Virtual Teen
There.com
Try xivio, it's a free 3D virtual world.
The internet.
IMVU
The best virtual world for tweens to play on is www.ourworld.com. it is easy to get started on and entirely FREE! On most virtual worlds you need to purchase a membership but on ourworld you don't. Most of the items are available for ALL members. www.ourworld.com is the best website for a tween virtual world.
Imvu.com
the best virtual world where you can do, say, and act anyway like has to be Smallworlds.
Animal Jam