This study investigated the development of curiosity in young children. A previous study by Kreitler, Zigler, and Kreitler had identified five specific types of curiosity, manipulatory curiosity, perceptual curiosity, conceptual curiosity, curiosity about the complex, and adjustive-reactive curiosity. The basic problem was to describe the development of these five types of curiosity in three-, four-, and five-year-old children. A secondary problem was to determine if children follow a predictable pattern in their development of the five types of curiosity. Five tasks, measuring nineteen variables of curiosity, were administered individually to thirty three-year-olds, thirty four-year-olds, and thirty five-year-olds by a trained rater. Mean scores for each variable and each type of curiosity were calculated for each group.