The development of the “CrissCrossing the Park” project explores urban sensing specifically focused on air quality and environmental sensing at a micro-scale in New York. This project stemmed from our prompted research site, Starlight Park in the Bronx, and our client, the New York City Department of Parks and Recreation. The premise of this project approaches a topical discussion on how we, as urbanists, approach the inevitable integration of sensors in a public realm. We were encouraged to “play” in our sandbox (the course), and were provided with foundational tools to explore sensing at a “Do It Yourself” (DIY) level. “CrissCrossing the Park” is a response to the environmental injustices currently taking place in the Bronx borough. It is a proposal for an educational engagement and activist tool that allows community members to become more aware of the conversation of air quality in individuals’ parks, which tend to seem out of reach.