Do you let your kids sing while you and they are shopping? I do, unless they are getting loud or obnoxious. Or both.
Last week, I was at Walgreens with the kids and they starting singing "John Jacob Jingleheimer Schmidt." Up and down every aisle. I was mostly just ignoring it and finally they seemed to run out of steam. I noticed a senior citizen lady behind us in the aisle and she was just beaming. When the kids stopped she said, "I remember that song!" And she proceeded to sing it to the kids. The whole song. They just looked at her and their little faces seemed to say, "Who are you and why are you singing our song?"
And now, I dare you to leave without having that song stuck in your head!