Is it possible to narrow your presentation to Backyard Chicken Farming?
Show a small starter coop and chicken tractor, complete with 2-3 birds inside, let the kids push/pull the tractor around, point out the benefits of backyard chicken farming, teach about composting the manure. Tell people that they don't have to have 50 birds but that small scale chicken keeping--even 2-3 birds--is beneficial and not too expensive to get started. Show off coops built of reclaimed or throwaway items. Explain how to deal with manure, which I bet is a sticking point with people. Tell folks where in your county it is permitted to raise backyard chickens and how to address getting the laws changed where it isn't---there could be many people interested and they could support each other to work on the cause, just because you raised their awareness. This strengthens and builds your community! Plug the books and this website, as well as your county extension office, if they are friendly to your cause.
If I had seen something like this at a county fair, I would have started this endeavor two or three years ago instead of waiting until this year. I would have found it encouraging and, since my husband would have been with me, it would have taken less time to get him on board with the whole idea.
Best of luck out there, Chicken Ambassador!