“Would you like to swing on a star
Carry moonbeams home in a jar
And be better off than you are
Or would you rather be a mule?

A mule is an animal with long funny ears
Kicks up at anything he hears
His back is brawny and his brain is weak
He’s just plain stupid with a stubborn streak
And by the way, if you hate to go to school
You may grow up to be a mule”

Hahaha, who knew swing music was the first PSA ad? Stay in school kids, ‘cause Bing Crosby says so.