I severely recommend all of these. (mostly wolfquest)

Just copy and paste the addresses below.

www.Wizard101.com

http://www.wolfquest.org/

www.toontown.com

http://www.fusionfall.com/splashpage.html

http://starwarsgalaxies.station.sony.com/players/index.vm

this one v gives you a 14 day free trial. then u have to buy it. but its TONS of fun.

http://www.cityofheroes.com/

With these you need a fast computer, but you don't have to download it. TONS OF FUN.

http://www.maidmarian.com/Sherwood.htm

http://www.maidmarian.com/MOONBASE.htm

http://www.maidmarian.com/Tank.htm