Object: A voice coming by microphone from an unseen person (the speaker is visible).

Good morning, boys and girls. I want you to be very quiet for a moment and just listen very carefully. (In a booming voice, let someone unseen introduce you with some fanfare over a loudspeaker system.) Wasn't that something! Did all of you hear that voice? (Let them answer.) Where did the sound come from? (Let them answer.) From the loudspeaker. Let's listen again and see if we can figure out who is speaking. (Let the voice repeat what he said the first time.) Wow! Wow! Wasn't that something? What do you call the thing that just happened? (Let them a…