Open the Playground mobile app. Tap the hamburger menu in the top left corner of your screen. Tap "Guardians".
Tap "Add a guardian" at the bottom of your screen.
Complete the required information and tap "Done" in the top right corner.
A success notification will pop up at the top of your screen indicating the guardian has been added. Tap "Send" if you'd like to send an invite to the guardian immediately or "No Thanks" if you'd like to wait to invite the Guardian to create a Playground account.