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Open-source 'story box' built on ESP32 uses a kids' storytelling device for daily learning

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A developer released Marelleo, an open-source story box built on an ESP32 microcontroller for his children, and it gained notable traction on Hacker News. The project's key design idea is to attach a daily training routine to content kids already enjoy, using a device already in the living room rather than new hardware. The article argues that long-term engagement, not hardware performance, is the main bottleneck in training and rehabilitation apps, which often lose users within the first week. The piece extends the same principle to vision therapy, citing Amblyotube, a Meta Quest app for amblyopia that delivers different visual feeds to each eye while users watch video content. The authors note that the app is a supplementary training tool and not a diagnostic or curative treatment.

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