My brother plays in a Christian band and the bass player related this story about his son, Josh. 4 year old Josh and his family were visiting grandparents for a meal, and Grandpa asked Josh if he wanted to say the blessing. So Josh, and everyone else bowed their heads, and Josh started mumbling the blessing at such a low volume that Grandpa couldn't make out what he was saying. When grace was over (with a louder AMEN), Grandpa says, "Josh, it was very nice of you to say the blessing for us, but I couldn't hear what you said." Josh replied, "I wasn't talking to YOU!".
(From the "Rest" of RHF)