 Many hits of the age owed their comic effect on wellnigh dadaist meaninglessness and simple nonsensical rhymes such as "Mein Onkel Bumba aus Kalumba" ("My uncle Bumba from Kalumba") or "Mein Papagei frisst keine harten Eier" ("My parrot won't eat hard-boiled eggs").It is possible that the idea of vowel exchange derives from like games played by children in Romance-speaking Europe.The same vowel-exchange rule applies to the Spanish song-game "La mar estaba serena" (also