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
ELCA World Hunger has a pretty cool simulation called Food For A Week. "You've lost your job, have dwindling savings, and $60 to feed your family of 5 for a week. What's in your grocery bag?" The program includes a detailed leader's guide that includes a description, materials, tips for planning, running the event, and discussion questions with a Biblical connection. Everything you'll need is on the website.
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.