This study aimed to clarify children's interaction and to suggest for the enrichment of active learning. After the classes where children recognized and investigated problems from natural events, and then they interacted with other groups in "Free Time", the data of their learning were analyzed. It was clarified that children started learning by themselves and other’s ideas could be understood empathically and investigated. In addition, children could agree in the whole class by going to other groups with purposes, conducting experiments and talking until they were satisfied. It was suggested that in order to enrich active learning, teachers need to continue to cultivate chilren’s awareness that one goal of science learning is the agreement in whole class, to recognize that children have the ability to learn independently, interactively and deeply, to design classes that children can demonstrate their power, and to coordinate the learning of children in class.