Step two: Click Add Card in the dropdown menu to add card.
Step three: Key in minor's debit card number and click Next.
Step four: Card verification code will go to the primary phone number or the email address on record on that account (either of which could be the minor's) so the parent/guardian would need to get the code from the minor in that case.
Note: If the minor on the account accesses My Cards through their Online Banking, the minor can set controls and alerts which will override the parent/guardian's settings.