Cities in the Baltic Sea region are challenged by emerging societal and demographic changes and a growing need for sustainable development of neighbourhoods. Active co-creation among citizens and between citizens and authorities can be a way to overcome increasing exclusion of socially sensitive groups, such as the elderly and minors, and to advance Baltic Sea region social innovation. The UrbCulturalPlanning project uses cultural events and gaming methods to engage people into urban social innovation, and to compile a toolbox with good practices for other cities.