The nature of science is exploring, and the role of teacher is helping children to explore science. According to that understanding, the researchers decided to develop the strategies of instruction, and then evaluated the strategies can be used or not. The researchers worked with the teachers at a kindergarten in Ping-Tung county for one year. During the process of action research, the researchers found that the exploring activity can be used and attained three conclusions as follows: (1) pose the important elements of the theme is useful to design the scientific activity plans; (2) change the question style and enhance group-discussing can promote children's exploring motivation; (3) children's ”spontaneous concept” is the foundation of learning ”scientific concept”. Finally, the authors provided two suggestions to the readers.