The first part of this book describes the background and the current state of the art through a summary about: obesity and sedentary lifestyles as one of today’s main public health problems; the relationship between PA, obesity and academic and cognitive performance; and the most recent findings on PA in the classroom, as a tool to improve health and cognitive performance in early childhood. The first part also details the aims and methodology used in the MOVI-da 10! study. The second part specifies the characteristics of the MOVI-da 10! programme, and provides copiable session plans of the 100 activities used in the programme, which can be of use for any professional interested in implementing PA interventions based on active breaks in the classroom.