Won't gathering marshmallows be a bit messy? We have critter-issues at my school, so I guess I'm always thinking of that

What if they earned cotton balls or puffy balls that would represent the mini-marshmallows they'll receive at the party? You could cut out a mug shape for all the students and they could attach the plastic bag for real mallows or some other representation to the mug. You could title it something like "Serving Up Good Behavior"
