The book "Approaches of Primary School Children in Changing Representations" by Katharina Kuhnke offers an in-depth analysis of the abilities of primary school children to utilize different forms of representation and switch between them. Through 15 individual case studies, the process of changing representations is examined, with a focus on multiplicative representations. The author considers this process from an epistemological perspective and reconstructs it as a complex structure. Various criteria that are significant for children in this activity are elaborated upon. This work is particularly valuable for educators and professionals who engage with the learning processes of children in primary school age.