At birth, sight is still underdeveloped. At first babies see clear. high contrast patterns best. and the ability to distinguish image details and colors gradually develops over the following months. That's why babies like contrasts so much. Box contains 12 double sided flash cards bound together by string. Comes with a usage guide for parents. This set with brighter colors is for baby/toddler age six months to nine months and up. ISBN Book item. birthday, Xmas, gift, birthday gift, contrast cards for infants, high contrast baby cards, black and white cards for newborns, curious baby activity cards, exploring the world, baby flash cards, visual stimulus cards baby, baby high contrast cards, sensory cards for babies, colors, learning, first book, educational, train skills, concentration, first puzzles, first cards, illustrations, exploring, family time, time with baby, family, creative, play, brain teaser, fun, European, made in Europe, made in EU, made in Poland, premium, quality