Engage little hands, eyes, and ears with this set of rattle rollers from Yellow Door. Each roller offers a different visual and auditory sensory experience, including a fluorescent roller that glows under UV light, rainbow beads that create a gentle rain-like sound, and high-contrast black and white beads for visual tracking. Easy for babies and young children to hold, shake, and roll, the set supports eye tracking, hand-eye coordination, fine motor development, gross motor movement, and sensory exploration.