Watch a video clip of Rosalie Sorrels. Folk music is music that people use in their lives. That's what distinguishes it from popular entertainment and art. It's something that everyone knows, instinctively. It is a children's song.
People know it all over the country.
They don't know that I wrote it, which is the first test of a folk song. If you know who wrote it and associate it with that person, it usually isn't a folk song. People write verses to that song all the time. Many people have adopted it. I made it up out of things my children said to one another.