Give Your Kid Permission
Kids can include an email address when they sign up to send a permission request email right away, or they can add an email address later.
When a kid is logged in but hasn't yet received permission, they will see a yellow bar at the bottom of the screen. Click Ask my parents' permission on the yellow bar, then add a parent email address and click Ask Permission.
You will receive the email seen below. Click the purple button that says Verify [kid username], choose your country and input a zip code, and click "Let's go!".