A child account has the following characteristics:
An email address cannot be registered to a child account. As such, any notifications sent via email are sent to the email account registered with the parent or guardian's Nintendo Account that manages the child's account. Benefits that are given to Nintendo Accounts based on whether they have an active opt-in to promotional emails can not be granted to child accounts.
Child accounts can only be created for users aged 17 and under.
Some My Nintendo missions cannot be completed by users with child accounts.
Other than these points, the function is almost identically to any other Nintendo Account.