The most powerful visual aid I know of is a little door with a bunch of access systems mounted on it. These should be off-the-shelf commercial systems, not home-made adaptations. Most people new to the field like to see practical examples that they can imagine themselves walking into a store and buying. No matter how technologically advanced it is, if they can see exposed wires or computer code they will not be impressed.
For the same reason I would not have a Proxmark anywhere in sight; just have one handy if someone turns up who is already into coding.
Also, I think the order is important: first they must be enticed by what they will be able to do. As silly as it may seem, if you Rick roll people on their own phones a good number will hang around to see what else they can do. If they see a big syringe among your toys, not so much. Blinkies and videos of people starting their Teslas should come way before needles, piercing studios and an explanation of “the advantages of the Iceman fork”.