Two sessions of a kindergarten show and tell (spaced 18 days apart) were observed to compare the participant structure and the content of this shared time. Participant structure was examined in terms of turn taking, spatial arrangement, and teacher management of the event. Content was analyzed in terms of topic and cognitive level. The changes in structure that the teacher made for show and tell from the first observation to the second observation provided a more informal setting, effectively decreasing the status differential between teacher and children. Increased participation on the part of the children resulted, as did an increase in the responsibility of the children for structuring the flow of sharing time. Most of the topics for discussion were objects from home. Children's contributions increased dramatically under the changed participation structure, while the teacher's contributions decreased correspondingly. In conclusion it was found that the changed goals and structure of sharing time raised both the quantity and the quality of the children's sharing time communication. (HOD)