This black-and-white book series has been specially designed for toddlers. According to Maria Montessori’s theory – the world-famous Italian pedagogist – before infants are able to clearly see colours, they respond to the strong contrast between black and white, which makes this the perfect first book series for brain and vision development. This series would provide over 64 exercises for babies during their visual sensitive period. Slide-and-pull tabs make these books even more joyful, attractive and unique on the market!