For I was hungry and you gave me food, I was thirsty and you gave me drink, I was a stranger and you welcomed me. Matthew 25:35

This simulation is cool! It helps kids understand the cost of food, encourages them to get smart about community resources, and provides an excellent opportunity to think about their community. I suggest planning a service event trip to the local food shelf, soup kitchen, Loaves & Fishes, etc.
Many kids have no idea what impoverished people go though. We've created suburban communities where they aren't a visible part of our lives so we don't have to think about them. It's so much easier to think about the people in Africa or Peru than those in the neighborhoods we don't visit. Show them why they're doing a food drive.