The weight of time

When we were young, we often first learned about time from a clock. But clocks only tell us “what time it is”—they never explain what time actually is. For children, time is always flowing, always moving forward. It has a process—a beginning and an end—and a rhythm: sometimes it flies, sometimes it crawls.
While abstract, this concept plays an essential role in a child’s development. Understanding time isn’t just about reading a clock—it’s about feeling its passage with their whole body: experiencing beginnings and endings, fast and slow, and ultimately finding their own rhythm within it.
Inspired by this idea, we designed "The Weight of Time"—an interactive system that transforms time into something tangible through weight and light. Children hold objects of different weights to sense "light" vs. "heavy". They watch shadows slowly shift and grasp the continuity and change of time.
Through this multi-sensory immersion, they intuitively feel durations, rhythms, beginnings, and endings—nurturing a sensitive and curious relationship with time’s passage. Designed to emphasize process-awareness, multi-modal feedback, and open-ended exploration, it supports children in naturally developing their own internal sense of time. We care less about whether they memorize "5 minutes" or "10 minutes"—what matters is that through physical and sensory engagement, they grow their own timing rhythm and harmonize with life’s flow.
Iterative testing with kids led to key refinements: an adjustable light for clearer shadows, a responsive algorithm, and a hidden "time code" linking weights to units (like 5, 15, or 30 minutes). With companion toy sets, children can combine "time weights" and playfully uncover the magical relationship between weight and duration.
The final version offers an immersive and gentle time experience, integrating weight, light, shadow, and body movement. It lets children “converse with shadows,” perceive the ties between duration, rhythm, and emotion, and marks the product’s evolution from a functional prototype to an experience-driven design.
The Weight of Time reimagines time education—transforming the invisible into something children can hold, see, and explore. It cultivates sensitivity to rhythm and continuity, encouraging them to grow with time rather than chase it.