The goal of the present study was to assess the nature and development of children’s concepts of miracles — their understanding of what miracles are, their beliefs in miracles, and their use of miracles as an explanatory device. A total of 36 7–12-year-old children attending an Episcopal school were given a combination of tasks and structured interview questions. Parents filled out a family religiosity questionnaire. Results revealed multi-faceted conceptions of miracles, along with a high level of belief, and indicated that children considered miracles an effective explanatory construct. We apply these findings to the general question of how children learn to explain their world.