Never so far! They have no desire to, because they are afraid they won't have enough time to eat. Poor things, I don't blame them...buying lunch cuts into an already very short eating time. They are starving by lunchtime and are happy to get to sit down immediately and pop open their lunch bags. DD1 even told me that she reminds her friends who buy lunch to hurry up and eat (because they tend to talk and not eat) so that they get enough to eat before recess!!