ABSTRACT This paper describes the authors’ exploration and experimentation with cellular pneumatic aggregates for kinetic, environmentally responsive envelope systems. The work is situated within the history and technology of pneumatic structures, biological paradigms, the agency and aesthetics of material, information translation, and the tension between performance and affect within responsive environments. The paper elaborates on the physical and computational development of novel pneumatic systems, experimentation with their interactive capabilities, and a recently completed installation, Nervous Ether , a pneumatic spatial envelope that operates as an instrument to register and communicate remote environmental information while also developing affective interaction with inhabitants.