Try "Old John The Rabbit"
You can extend the middle section by adding the ames of many crops and the response of "Yes, M'am" can be played on any malody instrument.
Old John the rabbit, yes m'am, had a mighty bad habit, yes m'am of jumping in my garden, yes m'am, eating up all my carrots, yes m'am, eating up all my spinach, yes m'am (etc). And if I'm here, yes m'am, this time next fall, yes m'am, I ain't a-gonna hava any garden at all, no m'am.