Age determines the form and content of children’s books in many ways. People havexed ideas about what is suitable for a particular age and what is not, and digital tools can help to map and ask questions about such age norms on a large scale. For this project, the computer ‘read’ 32 Dutch-language children’s books published between 1975 and 2018, and it appears that explicit comments are often made about age in children’s books. Not only do we pay attention to childhood in the project, other life stages are explored as well. It seems that children’s books guard age norms the most, but these comments are often coloured by conflicts, humour, and irony.