Engaging visual stimulation - The development mobile's design uses contrasting black and white colors to stimulate baby's sight from day one. INFANT STIM-MOBILE FOR CRIBS DETAILS: Introduces baby to high contrast images and colors for early visual development with a hanging mobile over little one's crib. ADAPTABLE FOR BABY'S GROWTH: Adjustable cord on the Stim-Mobile allows you to easily change distance of plush toys from baby as they grow and their vision develops (keep out of reach, however).  VISUALLY APPEALING HIGH CONTRAST TOY FOR INFANTS: Professional research has shown that newborns are more attracted to high-contrast patterns than to color or brightness alone. The Infant Stim-Mobile for Cribs was designed for this purpose, encouraging baby to learn pattern recognition from the start. Calming music - Soothing lullaby to set the mood for baby. Perfect to play at home or on the go.