In my experience, the crew are always exellent with young kids in Club and First..as are passengers. The people who complain are either ignorant boors or, on here more likely, sciolists..there, I've learnt a new word from Pprune..
To answer the original question, yours are reasonably old so you could always start off on the
mum/child, dad/child variant and then swop over as they settle down so you can both dine/chat facing each other etc..
Whatever you do, enjoy the trip and your destination.