A guy getting kids into his garage with candy? Sounds creepy!
Well is that considered as kidnapping or marketing strategy at all?
don't take the risk if it's about your education,if you're will be punished after being caught,then avoid to do that thing
if you want to go with your first idea,don't just serve crappy unhealthy drinks or anything else,atleast serve a healthy things which could bring their parent's interest so their mummy will be fine to spend some money for the sake of their children
This must be set to be one of your priorities james so that you are going to consider your and their safety at all. But upon reviewing your ideas, you have a good idea.