If you have checked the Child's profile page and the icon is Red.
Ask the parent if they have received an email from Kinderly:
if they have, they will need to click Verify Now and follow the process,
if they haven't, you can resend the invite via the Parent Directory.
Also, make sure they have the Parent Passphrase, which can be found in Administration > Preferences, for the security check.
Note: It is also good practice to ask parents to add the following email to their contacts list, to avoid emails ending up in the junk/spam folders.