This document describes a study that used co-design techniques to involve teenagers in developing citizen science experiments. Over 12 sessions, researchers worked with 95 students to develop experiments related to public spaces, gender discrimination, and inequality. The co-design process included defining problems, research questions, conceptual diagrams, and planning tasks. Students provided feedback that the process contributed to a collaborative form of citizen science and integrated social concerns. The study aims to understand how co-design and interdisciplinary collaboration can be used to jointly construct scientific knowledge.