Nabisco World Chess Here's a good site for playing chess online. Please get parent permission to play on this site and to help you create an identity. This is a good site because you can play computer opponents and choose the difficulty level.
Online Kids Games Here's another site you can play chess on, and again, you will need parent permission and help to create an identity. This site will also allow you to play other online games such as tic-tac-toe, solitaire, connect four, hangman, and many others.
This will be the most challenging chess site link on this page. In order to play, you'll have to create an identity. Please ask a parent for permission to use this site, as well as to help you get started. Just a warning, though, some of the players on this site are very good players, so keep on trying!