Time is closely linked to people's representation of spatial experience. Previous research showed that adults primed with positive affect judged that they were approaching the event (ego-moving), whereas those primed with negative affect reported that the event was approaching them (event-moving). The present research investigated the developmental sensitivity towards psycho-spatial understanding by examining the role of positive and negative affect on children's perception of time. In Study 1, when tested in a within-subjects design, 5-, 7-, and 9-year-olds as well as adults made ego-moving judgments in response to an object of the positive event that was to happen in 2 days. However, by 9 years, children made adult-like event-moving responses to an object that stood for the negative affect. Five-year-olds continued to make ego-moving judgments in the negative valence condition, whereas 7-year-olds' responses were in transition. Study 2 replicated the full developmental pattern found in Study 1, even when the positive and negative affect events were towards the identical object in the between-subjects design and the time span was shortened to a few minutes. Implications of the affective spatiotemporal perception of time were further discussed in relation to the sense of agency.