Since the last curriculum reform in 2011, all Estonian lower-secondary students have to conduct a year-long creative work. Unfortunately, in many cases, it is implemented as an individual written report that has little to do with improving learners' digital competence or Computational Thinking skills. In the new national curriculum (to be in force from 2023), an alternative model is proposed for creative project work inspired by how the software development teams are working today: agile, collaborative design, rapid prototyping, and emphatic involvement of the target group. This paper introduces the process and the results of design-based research aimed at prototyping and piloting a set of learning resources (templates, tutorials, examples, etc.) for the redefined, collaborative creative project.