You've probably seen these cute little s'mores on Pinterest for teachers.
I re-made this to use for our volunteers. I think they turned out adorable.
We don't have a color printer at school so we ran them on colored paper. Cheap, I know but when you need about 40 for preschool alone you gotta do what you gotta do.
Maybe you can use these for your volunteers.
I think if you click on the picture you can save a copy as a picture. Let me know if that doesn't work in a comment.