Our students were learning about nature sounds - specifically birds and insects. We listened to the first radio broadcast that featured nature sounds; Beatrice Harrison played her cello as the nightingales sang along.
From there we listened to old time radio programs and listened to how they used sound to enhance the programs. The children were tasked to create their own radio program that uses nature sounds in their program. With older children I would have suggested researching the history of radio - thus adding a bit of history to the project.
To demonstrate modern radio and how it works we visited a local radio program, WHSN 89.3 for a wonderful visit that inspired the children in new ways for their own project!