When a baby is born and opens its eyes for the first time, it cannot immediately enjoy this beauty. scientists tell us that babies are born without a sense of light, and their vision develops more slowly than other senses. Luckily, five days or so after birth, the baby will show a preference for pure red and pure yellow, and be able to correctly distinguish between red and green at about two months, and yellow and green at four months. How could that be? Do the colors have any special meaning for children?