Tummy time - placing babies on their tummies for a short period of time - is recommended by healthcare professionals to help babies develop strong neck and shoulder muscles. This Tummy Time! book is designed to keep their brains busy, too, while their muscles are hard at work. It's a double-sided panorama of high-contrast images on one side, perfect for their developing vision, and photos of babies on the other, because babies love looking at other babies. There's also a mirror, because babies love looking at themselves! Ideal for newborns to babies up to 9 months old.