Our project, 'Doing-It-Together Science', DITOs, represents a step change in European public engagement with science and innovation. We propose moving from a model in which scientific research, innovation, and problem-solving is mainly driven by scientific/professional institutions to one based on active public participation and capacity building with various levels and strategies of engagement in the scientific process. At the core of our ethos is a recognition of people's existing expertise and the different ways people want to and do engage in science and technology. The project is aimed at elevating public engagement with science across Europe from passive engagement with the process of developing science to an active one. Citizen Science and Do It Yourself (DIY) scientific efforts demonstrate that this is possible, and our aim is to ensure that the European Research Area will become leader in ‘deep’ public engagement that is afforded by these advances.As a 'Coordination and Support Action', this project will support and build upon DIY, grassroots, and frugal innovation initiatives so that in the short and medium term we sustain localised capacity building and in the long term the effects of these grassroots efforts channel to policy makers at different levels, from external advice to societal inputs, regarding appropriate research and innovation policies.The proposal includes the participation of policy bodies (European Citizen Science Association, DE), SMEs (Tekiu, UK; Eutema, AT), Universities (University College London, UK; Universite Paris Descartes, FR; University of Genève, CH), Science galleries and public spaces (Royal Belgian Institute of Natural Sciences, BE; Medialab-Prado, E; Kersnikova Institution, SL) and NGOs (Meritum Association, PL; Waag Society, NL).