If you are having trouble chatting or cannot see a chat bar appear on your screen, you'll need to verify your account using your parent's e-mail address. Simply navigate to Account Settings located on the bottom right corner of your game, marked with the "?" icon.
Then, press the "Manage Account" button in the window prompt that just appeared on your screen:
When you're there, you'll see a button labelled "Resend Verification", click it.
If you are having trouble locating the e-mail that is associated with your account, view this article.