Roasted marshmallows are a staple of Girl Guide campfire, whether eaten on their own or added to a s’more. Have you ever thought to make your own. This would make a fun project at camp.
Marshmallows are primarily gelatin and sugar. You can also replace vanilla with another flavour such as peppermint or add a little food colour. Do buy a candy thermometer though, I tried to make them once without one and it turned into a gooey mess.
There are lots of recipes online but I rather liked this one.