This study examines how complex issues can be appropriately communicated to children aged 3-6 years through the empirical research of five illustrators. Based on the empirical findings, three proposals for spreads that convey complex issues in the form of the global sustainability goals in Agenda 2030 are created. The study also investigates which creative design process is most suitable to apply in the design. This is examined by comparing two predetermined models that frame the design process in relation to the illustrators' experiences and approaches. Based on the findings, an appropriate approach is applied to the study. The study concluded that framing the creative design process within predetermined frameworks does not appear to be beneficial. All illustrators use individual approaches tailored to personal preferences and past experiences. Regarding the communication of complex issues to children, all illustrators agreed that these are topics that can and should be communicated to children. An appropriate approach in communication was to achieve a balance between the simple and the complex. It also proved important to prioritize children's positive reading experiences and to ensure that the communication is characterized by hope for the future. Based on these results, the study has created its own proposals for materials that communicate the global sustainability goals in Agenda 2030.