Mathematical content in second grade is mostly based on multiplying and dividing with numbers up to 100. One of the topics is the relationship between multiplication and division, important for further mathematical education and therefore should be approached carefully. Mathematical picture books can make it easier for children to understand the concept of relating multiplication and division. But by reviewing current picture books, it is concluded that they do not cover this topic. This paper describes process of making a picture book Swallows mathematical adventure which deals with that specific mathematical problem of the relationship between multiplication and division. Third grade pupils participated in two workshops in which they acquired basic knowledge and skills to illustrate the picture book with already given tekst. Both workshops were divided in 4 phases. Those workshops included: motivation with mathematical concepts needed for the picture book, short theory of picture book, art concepts used in making picture book, analysis of mathematical picture book, demonstration of text for the picture book, analysis of mathematical concept in the same text, demonstration of art techniques, and finally, process of illustrating a picture book. After the illustrations were finished, in order to get the final version of picture book, characters were graphically multiplied. Finished picture book was analyzed following both mathematical methodology and artistic aspects, but also considering some concepts from picture book theory (type, purpose, relation between picture and text and her function).