In the Child Table have a field 'ClientIDRelatedTo'. In that field, enter the ID of the 'Parent' client.
Create a relationship from the Parent Table to the Child Table linking ClientID = ClientIDRelatedTo
Draw a portal on the Client Layoubased on that relationship, and include in it the details of the Child Record.
That will show you that it works - there are easier ways to create a Child Record if you are adding a new one.
Another point to consider is to have all your contacts in one table (as some 'Children' may become 'Clients' latere, maybe?). Then just add that ClientIDRelatedTo field to the Client Table, and have the same relationship, but from the Client Table to another Table Occurance oif itself. You could denote the status of the Client Records by tagging with a 'ClientYesNo' field.
It's not really very hard to do.
Create a Table "Clients" with following fields:
ClientId = Auto enter Value - Serial Number
Create a table "Family" with following Fields:
ID = Auto enter Value - Serial Number
ClientIfFK = Number field
Then go to the relationships dialogue and make following relationship.
Double click the [=] sign in the middle of the relationship and select "Allow creation of records via this relationship" on the "Family" side of the relationship.
and select "Delete related records...
The first options allows you to create new family members from within a layout based on the "Client" Table.
The second option deletes all family records when you delete a client. That way you don't have any orphaned records.
Then create a layout based on the "Clients" table and in there create a portal based on the "Family" table.
I made you a little demo if you want you can look at that.
If you get stuck, let us know.
AAHHH, Looks like Sorbsbuster beat me :)