In the absence of a social obligation to eat at least a token amount, let your children choose not to eat if they don't want to. If the purpose of food is the sustenance of the body and the mind, then let that principle override schedules and expectations and traditions, most of the time. Your children will be more willing to eat to be polite if you only press it on rare occasions.
of The Big Book of Unschooling
which recommends SandraDodd.com/eating/humor
photo by Cátia Maciel