Children do not get accounts. They get child profiles, which belong to a parent's account, so a parent manages their own children, and you are not creating logins for eight-year-olds.
What a child profile holds
Name, date of birth, grade, a photo, and free-text notes.
Plus allergy flags (peanuts, tree nuts, dairy, gluten, eggs and shellfish) as separate switches rather than buried in notes, and an Other allergy box for anything else. That is deliberate: a volunteer handing out snacks needs to see it in a glance, not read a paragraph.
There are also fields for medical notes and an emergency contact (name and phone). Ask parents to be specific in the notes; "allergic to nuts" and "carries an EpiPen, kept in her bag" are different instructions on the day.
Grades move
A child's grade is stored, and the record knows when it was last promoted, so your children's ministry does not spend every September editing two hundred profiles by hand.
Worth checking each autumn regardless: the record knows the grade it was given, not which school district changed its cut-off.
Children in groups
A child can be enrolled in a group (Sunday school, a youth class), and staff do the enrolling, whatever the group's own join setting says. Parents can't add their child to a group themselves.
That is intentional and not configurable: somebody at the church decides which children are in which group.
Who can see it
The parent, and church staff. Staff see a child's name, date of birth, grade, photo and notes; allergy, medical and emergency-contact details are visible to the parent only for now. Children never appear in the member directory, and a child profile is never public.
When a parent deletes their account
This one surprises people, so it is worth being straight about.
If a parent deletes their own account, their children's records are kept and detached rather than destroyed. A child's record is part of your church's safeguarding history (who was in which group, what allergies were declared) and that is a record the church holds, not personal data belonging to the parent's login.
If a family asks for their children's records to be erased entirely, that is a real request you should honour, and a deliberate action rather than a side effect of somebody closing an account. Contact support and we'll remove them.
Ask once a year
Allergies change. Grades change. Emergency contacts change.
One announcement each August ("please check your children's details in the app") is worth more than any amount of chasing, because the parent is the only person who actually knows.