Any advice? Doing a thang at the local museum about rocks.

I don't know how I got talked into this! The Historical Society here is pretty active, and to generate interest in the local small town museum they try to schedule interesting sh*t. Like quilts, genealogy, an antique appraiser, and ice cream socials...you get my drift.
Somehow, back in the winter, I agreed to do a rock thing! And now it is time.
I have a great book with info on the Mohs scale so I will bring that and my toilet lid (it's my only porcelain! Hush up!) and rocks of different hardness.
I have contacted some folks here on RTH, working on getting some geodes and maybe some way to crack 'em. I hear a plumber's tool works well but I need to practice?
I have one good glow rock, and the museum has a little room with an ancient hand-held heavy light and a small collection. Working on that, any ideas?
I will feature some pure mineral samples from a collection handed down from my dad, some fossils and arrowheads the family has collected, and some treasures from my trip to Romania 2 years ago.
I plan to charge a small fee for the geodes and cracking if I can make it work and donate proceeds back to the museum.
Any other ideas out there?
Oh, yes, I will have jewelry, the finished product.
And I am going to haul my tumblers there, with samples of grit and stages of tumbling.
If you are interested in letting me beg, borrow or steal ideas and/or items, or pay for them, please give me a call. I am gonna take a chance here and put out my number. Thanks!
You can reach me on my cell at 308-882-6030. Leave a message or text me. I work a lot at several jobs and sometimes I cannot answer at the moment.
Thanks, people!
K