AI has been used widely for government decision-making process. In Pittsburgh, public algorithms are implemented on various fields including child welfare, housing and crisis prevention, which are increasingly shaping major aspects of their lives. However, community members’ understanding of the AI-based decision making tools remains ambiguous. In this paper, we imply co-creative design workshops with community members to learn what aspect of public algorithms that they are interested in, and envision how to inform them efficiently about public algorithms. We then discussed potential disadvantages and challenges of public algorithms. Finally, a potential solution, Tangible Poster, to collect community members’ opinions is introduced.