This is one of the advantages of working with 13-year-olds: they think of things you’d never have come up with on your own. Like making your own candy bars. Casting about on the web, I see there are quite a few home made candy bar recipes out there, but almost all of them appear to call for off-the-shelf components like pre-made wrapped caramels and jars of marshmallow fluff. But I say: where’s the fun in that? Let’s see what sort of mess we can make.