Object:
Create an echo by having someone out of view in the back of the church or in the sacristy repeat what you say. Make sure they can hear you clearly or give them a copy of the first few things you say.
Good morning, boys and girls. (have someone repeat what you said, but don't pay any attention to it) You certainly look handsome and beautiful today. (repeat) How many of you had a good sleep last night? (repeat) How many of you could hardly wait to get to church this morning? (repeat) That's strange; do you hear an echo? (repeat) I think I hear an echo! (repeat) Does anyone else hear an echo? (repeat, this will end the echo)