What a great resource. Get them involved with sending Care Packages. Maybe one listener could get together with a friend and they could put a package together. Or a family could get their kids and their classmates to write letters to send in a package. Or a class at school could get together and each bring one thing to put in a box with letters from the kids. There are so many possibilities. You have such a great opportunity since you have such great listeners. Go for it.
I really really like that you are educating your listeners on what not to eat and drink, and what not to rent or buy. Good for you!