Discusses the psychometric properties of the Children’s Playfulness Scale (CPS; L. A. Barnett; see record 1991-11480-001). The identification of 5 underlying components of the playfulness construct (physical spontaneity, social spontaneity, cognitive spontaneity, manifest joy, and sense of humor) are specified and validated. Factor-analytic procedures confirmed the existence of the general playfulness factor and the 5 dimensions, and reproduced the same factor structure and pattern across independent samples and raters and across 2 types of response format. The relationship between the CPS and other extant play measures was explored. The CPS appears to be a viable measure of young children’s playful predispositions.