Robotics provide the opportunity for students to bring their individual interests, perspectives and areas of expertise together in order to work collaboratively on real-world science, technology, engineering and mathematics (STEM) problems. This paper examines the nature of collaboration that manifests in groups of elementary and middle school students attending a summer robotics camp. The research study provides a preliminary look at the tasks, activities, dynamics, and interactions of the students that occur during the collaborative work time of the camps. Findings detail the role of discussions and hands-on robot building as important predictors of on-task behavior during collaborative work time.