- Developmental support: An anatomically shaped plush rattle with a lightweight grip supports hand-eye coordination. Safety-tested seams and washable materials enable long-lasting, practical play. - Layered audio stimulation: Built-in sound module with rhythmic tonal steps trains hearing perception. Gentle tone transitions help baby differentiate nuances and develop better tonal memory. - Tactile activation: Designed to specifically stimulate the sense of touch with varied textures that invite exploration, while repeated grasp training strengthens hand muscles. - Ergonomic design: Soft play ring paired with a curved grip arc promotes intuitive grasp movements and supports ongoing hand motor development. - Material and care: Plush fabric exterior; machine-washable; safety-tested seams. - Use scenarios: 1) Floor play and tummy time: baby reaches for and grasps the rattle while listening to layered sounds, supporting coordination and auditory development. 2) Independent exploration: baby handles the rattle on the play mat, discovering textures and the cause-and-effect relationship of actions and sounds. 3) Caregiver-guided interaction: during daily routines, parent or caregiver cues baby with touch and sound, enhancing bonding and sensory processing.