I have a USA passport and got a 45-day visa exempt entry which expires Dec 17. I have my wife and 5 children here with me. We are going to pay the 1,900 baht fee to get the 30-day extension this week. I assume the 1,900 baht fee is per person - but it seems that I don't need to pay to extend my 5 children if children can't be fined for overstay, is that correct? We are going to fly to Laos for a border bounce in January, so I want to make sure there won't be any problems if they have overstayed.
Separately, I'm in Nimman area of Chiang Mai and I remember there being some advice about a particular immigration office in Chiang Mai that is not very busy. Any suggestions on which one to go to?
TLDR : Answer Summary
A USA passport holder with a 45-day visa exempt entry plans to extend their stay in Thailand for themselves and 5 children. They question the necessity of paying extension fees for their children given that minors typically face no fines for overstaying. A commenter confirms that children under 15 cannot be fined for overstay and suggests visiting the Central Festival immigration office in Chiang Mai as it is less busy.