You've got a playdate that ends 1-1:30ish. Kids are two boys 4&8, parents are staying. Do you offer lunch?
If there isn't any sign of lunch by 12:30ish, is it rude to ask whether the younger one could possibly have a sandwich? (he has SEN with massive issues around eating, a limited diet and needs to eat at a certain time.)
If the mum says 'yes' to the sandwich, but then produces something completely different that the child won't eat, is it rude to (as politely as possible) give her a heads up that said child probably wouldn't eat it? Let's say it was a salad for example.
I always thought that etiquette was either to check what they like before it's too late or produce something almost universally liked.
Maybe I'm wrong.