I would love any input on presenting the hobby to our field day visitors. Here is one off the top of my head. Next to a map that has push-pins inserted showing the locations of our contacts for the day could be a table with a 100Watt light bulb burning in a socket. An explanation about all the radios they see in operation are radiating the same energy as the exhibited light bulb.
I just made my first radio contact with a ham in Suriname. 3,122 miles from house to house. My radio puts out a maximum of 100 Watts and my antenna is a couple of scraps of household wiring. My television uses nearly 700 Watts just to show me what’s on YouTube today. How many visitors might be surprised at how little power it takes?