Sometimes, they are not free. Before your child signs up for any site, be sure to check it out first. Find out all fees and determine whether the investment is worth the return.
Almost every game comes with parental controls. Check to see if you can play the game online. If it's able to be played online, cheap runescape gold limit how much Internet access kids can have. Other limits might include checking friend requests and limiting playing time.
Many games on the Internet let you either earn special items or buy them with cash. Make sure that you analyze whether or not this is worth it. Many cash purchases don't really do that much to help you win the game. Or, it could save you a lot of time.