[Introduction] Swing and roll up with a pleasant sound. It is a good toy for babies to carry around. The rattle is beautifully crafted, with patterns on both sides and a crisp sound. Please wash the toys with warm water before use! [Other functions] 1. Cultivate the baby's curiosity; 2. Exercise the baby's hands, fingertips, eyes, ears and body; [Parents reading] ◆ Auditory, visual and tactile senses are important means for infants and young children to recognize and perceive the world. ◆ From 3 to 10 days of birth, babies can learn to coordinate the eye muscles, can stare at the bell 2 feet away, and can perceive moving lights. About 20 days, babies can initially distinguish colors and distinguish the pitch, sound and duration of sound. A 1-month-old baby can distinguish between happy and sad music. Therefore, parents can place larger toys 30 centimeters in front of their newborn baby. Toys with simple shapes, bright colors or sounds can attract the baby's attention. Some crib bells, baby rattles, and baby handbells are suitable.