Age range 0-1'Tummy time – placing a baby on his or her stomach while awake and supervised—can help your baby develop strong neck and shoulder muscles, and promote motor skills.' — Mayo ClinicHere's a book to keep babies’ brains busy while their muscles are hard at work. It’s a double-sided panorama of images – high-contrast on one side, designed to attract babies’ attention, and photos of babies on the other, because babies love looking at other babies. There’s a mirror, too, so babies can look at themselves!