It generally consists of an easy-to-grasp handle and an enclosed chamber containing beads or bells that produce gentle, soothing sounds when shaken. Bright colors, high-contrast patterns, and crinkle fabrics help develop a baby's vision and encourage visual tracking. The gentle rattling or squeaking sounds provide cause-and-effect feedback, boosting cognitive and auditory development. The lightweight handles are sized for tiny hands, which helps babies practice grasping, reaching, and hand-eye coordination. Typically made from non-toxic, BPA-free plastics, silicone, or soft, plush organic fabrics. Many modern rattles double as teethers, featuring textured, chewable surfaces to soothe gums.
