From a perspective of students in school year 5 and 7 in a Swedish secondary school, the study investigates an interdisciplinary creative musical project, an original. The joint creative process extends over almost a year and everything the students do: writing, music composing, set, costumes, sound and lighting is original from idea to performance. Data-collection included participant observation constituting a background for three main-data: written compositions, questionnaires and interviews. The students are pointing out co-operation and social interplay as rather important for their project. Also their way of working in small groups, on their own responsibility, gives every student the possibilities to participate and contribute with personal abilities, skills and interest. The teacher´s role as superwicer also provides an active participant for the students. The main force of the process is to create something new, an excitement providing motivation and inspiration during the work. The students become aware of elements, which appear as necessary qualities and requirements for a real collective creating process. They focus on the important in this working process, as the real-life situation, variations in everyday schoolwork, the social interplay, emotions, taking part in an experience, self-knowledge, enjoyment and learning in different fields. Also the time is pointed out as important for all this qualities take place. Creativity, fantasy and creating permeate the process as a communication where the will power to express oneself in both verbal and non-verbal ways are stimulated. All the different ways of conceptualising the working process are summarised in five main categories: Model and way of working, Social interplay, Experience, Learning and Creating. Each category is a part of a whole, and the integrated form of working manifests as conditions for a collective creating process