One-handed design for comfortable handling and seamless visual interaction during shared reading moments between parent and child. Durable sensor cards support sensory development: they accompany toddlers through developmental stages, promote cognitive growth, and enhance visual perception with age-appropriate stimulation. Made from durable, child-safe materials. Stepwise training with progressively complex graphics aligned to monthly development milestones to support effective learning and improve spatial recognition. High-contrast visuals with gentle color transitions stimulate visual development, aiding attention and object tracking over time. Use scenarios - At home during daily reading sessions with a caregiver, to foster interaction and visual engagement. - During quiet play or travel to sustain attention and support recognition and tracking. - In daycare or therapy settings to track progress and guide development-focused activities.