Within the COESO project, WP6 "Enhancing Public Engagement in Citizen Science through transmedia writing and mutual learning" introduced project participants to transmedia approaches toward facilitating scientific and collaborative processes. Deliverable D6.1 "Report on the activities of WP6" notably includes the documentation and outcomes of the Mutual Learning Exercises. This document first introduces the rationale behind the MLEs and the purposes for which they were designed. Thereafter are presented the various activities that were developed within the Work Package 6, focusing on the potential to propose new forms of collective learning in citizen sciences through participatory and creative activities. Lessons from these activities are drawn, offering models geared towards inclusivity of all participants.