The Joy of Learning Multiliteracies (MOI) programme is designed to promote multiliteracy among children aged 0–8. It entails professional development and collaboration among professionals working in early childhood education, pre-school and the initial stages of primary education (years 1 and 2 of Finnish compulsory schooling), as well as in the library and cultural sector. The aim of the MOI programme is to develop models (i.e. learning environments and pedagogies) that can boost children’s multiliteracy and reinforce expertise among personnel working with children educational and cultural institutions. This multidisciplinary development programme addresses cultural and gender-related inequalities. It aims to promote every child’s learning opportunities in the area of multiliteracy. The outcomes of the development programme are research-based models that promote children’s multiliteracy in an equal and fair way. The programme also provides an understanding of how multiliteracy can develop, and how to support and assess this in early childhood.