Children possess "programs" to fully use the capabilities of the mind and body. CRN's starting point is the concept that playfulness starts these programs in operation. That is, when children are absorbed in play, filled with excitement and a joie de vivre, the programs of the mind and body work in a full manner. Also, we define the term "playful spirit" as a certain feeling or emotion, thoughts, curiosity and an inquiring mind that arise when an individual is absorbed in something. The definition of "playful spirit" also includes the sympathy for others, and the positive attitudes toward and concern for people and things. In other words, a playful spirit encourages children's spontaneous learning.