<a href="http://adf.ly/CKA3K">How to Reset Your Password</a>
2) Next, enter the email address you used to sign up for your account into the blue "Forgotten Your Details?" box. You must have a verified email address to reset your password, because the instructions will be sent to that email address.
3) An email will be sent to that address with a link to reset your password (Subject: WeeWorld Forgotten Password). Click that link, and and your password will be reset. They will send you your new password and username in another email (Subject: WeeWorld Forgotten Username).
The new password may be hard to remember, so copy & paste it to sign in. After that, it's a good idea to change your password to something more memorable.