They were Americans. Fairly young parents, I'd say mid 30s. Everyone neatly turned out but nothing flashy. Children ranged from c. 13yo to a baby. Clearly all related, as they had identical distinctive colouring.
Mum was mostly seeing to baby and Dad maintained absolutely complete order with the others. He was very calm and softly spoken, but everyone did as they were asked when they were asked. There was no fussing or attention seeking.
Also, I thought it interesting that the older children didn't seem to have any childcare role, they were well behaved, but they weren't looking out for their younger siblings.
This continued whist waiting at the airport, during the flight and through passport control at arrivals.
How do you think they've achieve it?
Also what do you do for a living to be able to take 7 DC on trans Atlantic holidays?!