These high-contrast cards promote good neural connections in your little one’s brain. The guide talks about how babies are naturally drawn to high-contrast items, and how research has shown that time looking at contrasting images can strengthen cognitive development. Hold the simple cards about 8-12 inches from your baby’s face, then move on to the more complex cards. You can also move these back and forth in front of your baby to help them practice following a moving object with their eyes. These cards are printed on quality paper, and made to last.