Cubes, cubes, cubes (Serbo-Croatian: Kocka, kocka, kockica) was a Yugoslav children's series, which was broadcast on the Belgrade radio from 1974 to 1993. In 2006 the show was repeated on Serbian state television.The main role was played by the kindergarten teacher Branislav Milićević, better known under his stage name Branko Kockica (German: Branko Dicechen).The most famous song of the series is the title song U svetu postoji jedno cartvo, u njemu caruje drugarstvo (German: "A kingdom exists in the world, in it reigns friendship).