This study examined the usefulness of picture book developed to show the significance of class activities and how to proceed with them. From the results, it was inferred that reading the developed picture book promoted (1) understanding how to compare and decide, (2) understanding to cooperate, (3) understanding how to proceed with discussion activities, (4) attitude toward discussion activities. In addition, it became clear that most of the children were attracted to the practical scenes, and in the discussion activities, they were attracted to the proposed scenes. This result was almost the same for children in the special needs class.