Given the importance of participatory methods in gerontechnology – especially to prevent the uncritical reproduction of discriminatory imaginaries in technological development – the lack of appreciation of how these methods can contribute to socio-material configurations of age and technology is striking. Inspired by the semiotic-material study of methods, this chapter provides a detailed account of how participation and public engagement were performed in a project on telecare both authors were involved in between 2008 and 2011. We show how the ‘civilising’ endeavour of this project was undertaken through the creation of two different instances of participation: in the first, representatives, experts and policymakers were enacted as stakeholders, in the second, end-users (older people and caregivers) were enacted as concerned citizens with telecare as a public issue. In foregrounding the realities enacted in the performance of these methods we emphasise, in conclusion, the need to address the materialisations of later life and technology, which these participatory methods help bring to the fore in Socio-gerontechnological developments.