Croatia's rivers belong to the Adriatic and the Black Sea basin. The rivers in the interior are large and calmer (Sava, Drava, Danube).
Children as young as one year old can be enrolled in the kindergartens though this is not compulsory. Most of the 450 kindergartens are state run and integrated with primary schools and some are privately run.
Croatia was one of the six republics of the former Yugoslavia.