Answer: No need.
If you have no intention of having your child participate in the calendar or chat process, i.e. they can’t read yet :-), there is no need to set the child up as a member.
To create events that help you and your co-parent follow child events (day care, babysitter, birthdays, etc..) simply do the following:
That’s it. Your event is setup. Anyone you shared the event with will be able to see the event and it’s details on their calendar.
The unique event color will help distinguish this event as a child event for you and your co-parent.
If you have any questions, please don’t hesitate to contact us at firstname.lastname@example.org.