Children in primary school often suffer from lower urinary tract symptoms (LUTS), which may negatively impact their overall well-being. Co-occurring neurodevelopmental disorders (NDDs) can adversely affect children as well and can cause restrictions in their daily life, especially in their school-environment. The goal of this observational study is to identify the prevalence of LUTS in Flemish primary school children.The main questions it aims to answer are: * How prevalent are LUTS in regular primary education? * Is there a relation with well-being in school environment? * Is there an influence of co-occuring NDDs? Children, parents and teachers will be asked to fill in questionnaires related to this research question.