Oh they are beautiful children. It seems like controlled chaos but M&F seem to do it well, although like most parents, probably relieved when it is all over.
Here in Australia we have carols concerts also. Our school had one last month, our local community had an evening outdoor event (on a cricket field) recently and then churches have then as per each religion's tradition.
There is Carols in the Domain in Sydney and probably the most popular is the Christmas Eve concert at the Sidney ( as per man's name not to be confused with Sydney) Myer Music Bowl in Melbourne. It is outdoors also and televised over the country and replayed again on Christmas Day at lunchtime.