The project "Circular spaces" will enhance at least 15% (5 from an average of 40) of maker spaces to circular business principles in the Baltic Sea region during the 27 months. The specific objective is to form a consortium of the BSR makerspaces to cooperate in the field of eco-design and material reuse, as well as to further develop a Digital circular collaboration tool that boosts maker and supplier cooperation in the field of the circular economy. At least 300 makers/start-ups will be trained and involved in the production of more circular products and at least 5 circular business ideas will be piloted. Makerspaces are not as environmentally-oriented as often proclaimed in literature and media, therefore attitude - behaviour gap should be decreased. However, certain maker groups do have a high potential of being activated as sustainability advocates by using circular economy principles. They can take on the role of early adopters of techniques for environmentally friendly product development and for doing that easy access to information, practices, methods, and sustainable materials are necessary. Supporting makers with an intrinsic or extrinsic motivation to take on the role of sustainability frontiersperson in the community by providing knowledge and guiding methods and tools is essential to decreasing the attitude-behaviour gap. Makers' communities are bodies of collaborative learning and collective knowledge where different types of barriers can be overtaken.