In the 1950s there was a delightful series of public service ads on TV that promoted tolerance and diversity through catchy songs, songs that could have been written by Tom Paxton except he was a little kid then. There was one about a trapeze artist named Joe who kept falling because he refused to be caught by a person who was of the wrong race or religion. The song went:

Don't be a schmo, Joe.
Be in the know, Joe.
Religion and race
Just don't count in this place,
So be in the know, Joe,
Wherever you go, Joe.
Remember that, Joe,
You won't fall on your face.

Tom Glazer sang it.

But the most indelible song had these verses:

Heard the choo-choo say
To the railroad track,
"Don't care if the passengers
Are white or black."
Ho-ho-ho, ain't it plain?
You can learn lots of things
From a railroad train.

and

Heard the peach pit say
To the apple core,
"The color of your skin
Doesn't matter any more."
Ho-ho-ho, can't you see
That the color of your skin
Doesn't matter to me?

Does anyone know additional verses? And who wrote these songs? I believe the (then) National Conference of Christians and Jews was behind it, a motley bunch of conspirators as ever there was.