What are the requirements for US citizens applying for a tourist e-visa for their minor children?

Looking for tourist e-visa advice for US citizens.

After getting to the final document-dump page of the e-visa application, I had questions about several of them. The main questions concern how to do these for our minor children (11 and 13 years old).

#3: Declaration: Do I sign the declaration for them? They can't legally sign something like this in the US.

#5: Proof of accommodation/invitation letter: We are renting a house that is owned by an expat living in Thailand. She has never had to write an invitation letter before. What needs to go in that letter?

#6: Financial evidence: again, what to upload for my children's application? My financial documents, or a letter I wrote saying they are my children?

#7: Confirmation of residence if not applying in country of residence: I don't know why this is an obligatory upload. I'm a US citizen applying to the Chicago consulate, so this question doesn't apply to me but I have to upload something.

#8: Travel records: Do they want pictures of every stamp page in my passport, or just the ones with stamps in them?

#9: Document confirming residency for application to consulate: again, what to upload for kids?

Thanks for any help! I used the search function and didn't find answers for the e-visa system, so my apologies if these have been answered before!