This paper examines what research with children can do and become when it intra-acts with a MeToo hashtag, creative methods, experiences of sexual harassment and the making and travelling of Valentine’s Day cards. The paper is grounded within a creative research-activist project, #MeToo Postscriptum, which aimed to address sexual harassment in pre-teen peer cultures. Analyzing the project, the paper explores how the idea of response-ability manifested in three space-times of the project, and how the material-discursive practices of the project reiteratively reconfigured the conditions of possibilities to respond, react, and act against abusive gendered and sexual child peer cultures. Mapping response-ability through our research endeavours helps theorize the contingent, complex, and entangled ways research-activist methodologies can activate change, enables us to envision response-able practices to counter sexual harassment in young peer cultures, and sensitizes us as scholars and educators to our responsibilities and accountabilities that become recrafted in response.