Explored the impact of regular reading of selected children's books in Slovenian preschools on the development of language competencies among 4- to 6-year-olds. Found significant differences in receptive language, expressive language, and storytelling between children exposed to 2 selected books per week over 2 months and those exposed only to the national curriculum. Found that quality of language education at home related to some language development scores and storytelling. (Author/KB)