Disfluencies of 20 children, ages 3.5 to 5 years, were counted in two situations. In each session a child spoke with his mother for 10 minutes, a second child spoke with his mother for 10 minutes, and then the two children spoke with each other for 10 minutes. A total of five such sessions was conducted for each child. The percent of disfluent words produced by the children when they talked with another child was not significantly different from the percent when they talked with their mothers. The percent of disfluent words for the group did not differ significantly across sessions. The number of words emitted by the children as a group when they talked with other children did not differ significantly from the number of words emitted when they talked with their mothers.