By joining it!!
EekoWorld is designed to help children between the ages of 6 and 9 learn about the important role they can play in taking care of the earth. EekoWorld (Environmental Education for Kids Online) features an engaging and interactive format that invites children to explore, experiment, and collaborate as they learn about conservation and the environment. ~pbskids.org
PBS Kids GO provides both the televised series The Electric Company, Fetch! With Ruff Ruffman, Wordgirl, Arthur, and Cyberchase as well as the child-oriented website with games, videos, and activities like EekoWorld, History Detectives for Kids, PBS Kids Jazz, and WayBack.
poptropica. educational, fun, and my favorite. webkinz. to make an account- you have to buy a toy (it comes with a code) and it is limited. club penguin. an activation email will be sent. miamiopia. a bit too educational. haha. wiglington and wenks. you have to verify the account on your emails inbox. secret builders. buying a membership is required. minyanland. not sure. its rumored educational. eekoworld. im assuming its educational.