This paper examines the development of the representativeness heuristic in early childhood. Using a novel paradigm, we investigated 3- to 6-year-old children’s ability to use base-rate and individuating information in their predictive inferences. In Experiment 1, we presented children with base-rate and individuating information separately to test their ability to use each independently. In Experiment 2, we presented children with base-rate and individuating information together. Two critical trial types were used, one in which the base-rate information and individuating information pointed to the same response and one in which the base-rate and individuating information pointed to conflicting responses. Results suggest that children progress to adult-like heuristic-based responding at 6 years of age.