Drei Chinesen mit dem Kontrabass

Three Chinese with a Double Bass! Based on a children's tongue-twisting game in Germany in which you must sing a song whilst swapping the vowel sounds around. Players have cards with a variety of phrases and roll a die showing which vowel to swap. Each player has a double bass and cover the 5 vowels as they progress. Baffling (and impossible for non-German speakers). - BoardGameGeek