Sparkling I know that. But OP posted this
B- AIBU having created a huge buffet of party food today assuming the kids would eat and every single one said they didnt want anything because they'd eaten. Waaaaaaaaa!!!
It was regular party food too!
and my response was to that really. Don't matter if there is food there and what it was, they weren't hungry.
OP see if my kids were attending it and you were feeding first then I would have held off, my in the gazillions 
of parties I've been to in the last 6 years, I've never seen it done this way, so still would have fed mine.
Still at least now you know, and if you ever want your food eaten, ask my 3 gannets along and they'll polish off the lot!