At this age, I can't imagine that one of them didn't say to the hosting boy..hey whatcha got to eat, I am starving!
My ds's friends know the rules..first time I show you where the kitchen is and where the fridge is. You are new to the relationship. Subsequent visits mean you ask ds whats to eat or you search the fridge yourself. At this age, there is no way I would make a lunch for them. I keep frozen pizza, hot pockets and other things handy. They are well old enough to know when they are hungry and when to start looking.
They are smart enough to leave the dirty dishes and the 1/2 empty water bottles and soda cans around for me to clean up when they are done so I figure that is my contribution to the gathering!
Kelly