FOSSbot is a 3D-printed educational robot that uses open software, open design and electronics, and can be employed in all levels of education. FOSSBot has been developed collaboratively by Harokopio University of Athens and the Greek Free and Open Source Software (GFOSS) community. The use of FOSSBOT in education will be supported by collaborative seminars for all teachers of all specialties and levels based on educational material developed at https://elearn.ellak.gr. The aim of the action is to familiarize teachers with modern education models based on the S.T.E.A.M approach. (Science, Technology, Engineering, Arts, Mathematics) and establish a student-centered approach to knowledge, based on open technologies, in order to lay the foundations for the creation of an open environment of discovery learning that will creatively contribute to the transformation of students into active citizens.