ScouterMan raises a good point - no matter how good the magic, only some of the kids will take interest. After your intial demos most of the Equipped Appeal (TM) will be to the older Scouts, and an organized High Adventure curriculum is tailored to older Scouts going on tougher hikes with more in depth information on preparedness tactics. Definitely I've seen interest in more advanced wilderness first aid topics appeal to fewer and fewer Scouts, but those often take it to heart and go right on through EMT training and into medicine and emergency response as a profession.

Don't worry if all the younger ones don't take to your stuff right off, there's time in a few years to catch the bug, if they're interested.