I have a couple of thoughts. I think you could have them "help" you make up the rules. You should get a lot of buy in that way. The other thought is are you sure that you want to close yourself alone in an unlighted room with one or two youngsters in this day and age. I'd be surprised if 4H doesn't have rules against it. I'd always have an unrelated adult "assistant" with me. It's not that I'm saying anything will happen but all it takes is one person with an agenda to make it get very ugly. It's a sad state of affairs, but one that needs to be thought about.