Examined behaviors claimed to reflect curiosity to determine whether there are 1 or more types of curiosity. A secondary purpose was to examine the relations between the 1 or more types of curiosity and sex, social class, intelligence, achievement level, and ratings of personality traits. In 2 sessions 84 American 1st graders were administered 5 tasks which measured observation of complex and simple stimuli, preference of complex and simple stimuli, preference for the unknown, structure of meaning, and object exploration. A normalized Varimax factor analysis allowed the extraction of 5 factors: manipulatory curiosity, perceptual curiosity, conceptual curiosity, curiosity about the complex, and adjustive-reactive curiosity. Only the 1st factor was related to a demographic variable, sex. The nature of the factors and their theoretical and practical significance are discussed. (38 ref) (PsycINFO Database Record (c) 2012 APA, all rights reserved)