kids don't care about grand meal

I don't think it's a matter of sitting in the Sims 4, because my sims usually don't stay on their butts or even at dining tables, but roam around somewhere, foodplate in hand. I even couldn't manage to summon them all for the food gathering, because some had routing failures, others were more interested in the gym, and I think only the mother sat down and ate the great meal at the table.