Over the past two years, VOX has provided insights into the interaction and developmental stages of kindergarten children in the documentary format ‘The Mysterious World of Children’. Tom, Mert, Paulina, Abigail and the other children have now started school. They were once again accompanied by cameras for the two-part documentary ‘Wie werden groß!’. The first-graders are accompanied for one episode each in a primary school and in an adventure centre. Viewers can witness how the eleven girls and boys have developed since their kindergarten days. But not only the children, but also the parents are asked to take scientific tests - and suddenly feel reminded of their own childhood. For the first time, developmental psychologists Prof. Dr Sabina Pauen and Prof. Dr Moritz Daum also take a close look at the parents' behaviour.