A: Registering upfront as a Guardian, or upgrading your existing account to a Guardian Account under your "Account" tab settings, gives you the ability to register and manage the privacy setting for all the Minor Accounts under the Guardian's account. 

Each Minor Account will shares the Guardian's  password, and the Minor logs in using their own unique username that was assigned to them at the time the Guardian created their own account. 

When the Guardian is logged into their own account, the Guardian will have access to a 'Profile Switcher', which will allow the Guardian to switch to view and manage any one of their Minor's accounts.