This chapter reports on four case studies that took place at four museums of the Metropolitan Organisation of Museums of Visual Arts (MOMus) in Thessaloniki, Greece, the Museum of Contemporary Art, the Experimental Center for the Arts, the Museum of Photography and the Museum of Modern Art-Costakis Collection. Different groups of young people participated in case studies that sought to bring together educational commons and collaborative artistic experimentation, leading to the co-creation of artistic projects. The chapter focuses on how commoning processes might contribute to the transformation of the museum towards an open-source institution through the cultivation of commoning practices in museum education. We also highlight the value of delving into forms of creative artistic engagement that induce unlearning traditional roles and questioning hierarchical power distribution.