This paper presents four major features of L. S. Vygotsky's theory of creative imagination. The first feature discussed is that imagination is the internalization of children's play. It is explained that the development of imagination parallels the development of speech which originates in the child's social dialogue with adults, passes through an egocentric phase, and is internalized as inner speech. This inner speech is credited with allowing for an individual's self-consciousness and self-regulation. Finally it is explained that, at age 7 years, the imagination no longer requires external supports and becomes an integral mental function, a consciously directed thought process learned through collective social interactions. It is explained that imagination may serve either personal wish fulfillment or be used in creative problem solving in art and science. The third Vygotskian feature discussed is that a convergence between imagination and thinking in concepts occurs during adolescence and matures in the creative thinking of the adult. The fourth and final Vygotskian feature considered is that both artistic and scientific creativity require the collaboration of imagination and thinking in concepts. (NB)