What documents do I need for extending my Non-Immigrant O visa based on having a Thai child?

A user is seeking an updated list of required documents to extend their Non-Immigrant O visa, using the reason of having a Thai child. They mention already knowing some of the requirements but want a complete list for verification as this is their first application for an extension in this context. Comments from the community emphasize the necessity of demonstrating parental rights and advise visiting the local immigration office for the latest information.