An update, the reference for part of this, Is in the new handbook at 33.6.2.
Make sure you have the full name and birth date for each child and search specifically for their records again before creating anything. You should also check to see if the family has an individual ordinance form for the children from their previous ward. If so, use the membership number on the summary to request their records.
If you do need to create a record then just print the Child Record Form and give it to the parents to fill out. It asks for all the required information and provides the parent's approval to create the record (which is required--don't just create the record based on 2nd hand information). You can print the Child Record Form from LCR by first selecting Membership > Create Record from the menu and then clicking the "Blank Create Record Form (seven or younger)" link toward the bottom of the page.
I am the WML and it would be wonderful if the clerks would do this for many part member families in our ward.
Is the same instruction good for finding the form and creating a record current? (I do not have access to clerk type of stuff.) Thank you so very much for any update of instructions you might leave.