We examine kindergarten children's emerging social meanings about science as a function of their participation in integrated science inquiry and literacy activities associated with the Scientific Literacy Project (SLP). We describe changes in 123 SLP kindergarten children's narrative accounts of learning science in school during three different time periods: (a) in September, before the onset of SLP activities; (b) in December, after children had participated in 17 lessons associated with 4 SLP units; and (c) in March, after children had participated in an additional 13 lessons associated with the SLP Marine Life unit. At the end of the year, we: (a) compare SLP children's narratives about science to those of a group of children (n = 70) who only experienced the regular kindergarten program; and (b) examine differences between SLP and comparison children's reports on a measure of learning activities in kindergarten that include science as well as privileged content areas such as reading, writing, and learning about numbers and shapes. Results support the conclusion that sustained and meaningful participation in conceptually coherent science programs is crucial for children to develop meanings about science as a distinct academic domain that comprises its own disciplinary content, language, and processes. (Contains 11 tables and 8 figures.)