They were pretty well-behaved. The older ones looked out for the younger ones. There were some issues, particularly with the “yellow chair.” It’s a combination chair/stepladder and we use it as an extra in the kitchen when necessary. All the kids love the fold-out steps, and they fight over who gets to sit in it. We had to work out a schedule on a spreadsheet.
I bet you had a wonderful time with them! they are very lucky to have such a nice group of close together cousins.