This chapter points out different ways involvement with collaborative projects share form, shape, or style, and may be imagined as nested within each other, like matryoshka dolls. It deals with the Platform for Experimental Collaborative Ethnography (PECE), the digital infrastructure that support new collaborative projects in anthropology. It also cites the long-standing collaboration of The Asthma Files (TAF), which is an experimental ethnographic research project that eventually led to the conceptualization and development of PECE. The chapter mentions the Digital Practices in History and Ethnography Interest Group (DPHE-IG) that was organized within the Research Data Alliance (RDA), a global collaboration of individuals and institutions working to make data more easily and openly shareable. It emphasizes how the collaborative form is the experimental form analyzed by Hans-Jorg Rheinberger as essential to a modern scientific style.