The purposes of this study were to compile lists of the words used by kindergarten, first-grade, and second-grade children in their oral language and to examine differences in the diversity of the vocabularies among the three grade levels. Twenty-nine kindergarten, 25 first-grade, and 23 second-grade children, all of whom attended schools in middle-class neighborhoods, provided the oral language samples. The results of the study are provided in narrative and tabular format, and a ranked listing of the 250 most frequently spoken words at each of the three levels is included. (RB)