For the last seven years a successful cooperation between courses in product design and industrial design has been running at the School of Engineering at Jönköping University (JTH), Sweden. The concept of fusing separate courses with different domains of knowledge into one project is of course well known by most teachers, but this course takes this form of education one step further. This paper will describe the experience of coaching over 90 design-build-test projects going through the steps design, build, test but also the steps of fail and learn.