how do a create a childs email account when I already have 6 people in my family but we now have another child.
how do a create a child's email account when I already have 6 people in my family but we now have another child?
You can't if Family Sharing is required and all 6 slots have been used up.
What is Family Sharing? - https://support.apple.com/HT201060 - "Family Sharing lets you and up to five other family members [Apple IDs] share access"