Accurate eyewitness memory of an event may be aected by exposure to and degree of involvement with other related events. In this study, we investigated whether interacting in a related video event aected children's accounts of a real-life target event, and whether interacting in the target event aected memory for dierent details within the target event. Four-, 6-, and 9-year-old children interacted with an adult who made a puppet. Half of the children in each age group also interacted with a video of a similar event (interactive condition) and half sat and watched the video without interacting (watch condition). When asked nonmisleading questions a week later, children in the interactive condition confused the two events more than those in the watch condition. The 4-year-olds in the interactive condition reported a higher rate of confusions in free recall than the 4-year-olds in the watch condition. There were no eects of interaction on responses to misleading questions. The 6-and 9-year-olds were more accurate at answering questions related to actions they themselves had performed than actions performed by the experimenter, although this pattern was reversed for the 4-year-olds. The results are discussed in terms of children's eyewitness memory.