"Korobeiniki" (Коробе́йники, lit. '"The Peddlers"') (or Korobushka) is a nineteenth-century Russian folk song that tells the story of a meeting between a peddler and a girl, describing their haggling over goods in a metaphor for courtship.

Outside Russia, "Korobeiniki" is widely known as the Tetris theme (titled "A-Type" in the game), the soundtrack of Nintendo's 1989 Game Boy version of the game.

Arranged for cello duet, it is fast and exciting, with pizzicato fun and running notes! Great for jamming, concerts or even for technical studies

These duet studies are intended as a companion volume and as additional exercises to the method 'Cello mit Spass und Hugo', but they are equally well suited as complementary material to any other course of study. Each piece tackles a clearly defined technical or tonal task, yet they are meant to be fun and useful additional to the chamber music repertoire in their own right. Initially the upper part is intended for the pupil, the lower one for the teacher. But as both parts are comparatively equal, they could also be attempted by two pupils. For group tuition it is suggested to introduce a couple of rhythmical accompanying parts.