Hoverflies is at the earliest stage of the design process, where the objectile is in its most fluid state of emergence. This provides a useful point of comparison for the meta-project's observation and theorisation of the processes of design across the three sub-projects. Hoverflies aims to design and build an interactive object which entices performative interaction and play. The work will explore notions of performed acceleration (the rate at which an object/body changes its velocity) using paradigms from embedded and ubiquitous computing, visual art and live performance to inform both the design process and the performance outcome. Using accelerometers as the mediating technology and the performing body in flight, the work will investigate how motion, gravitational pull, velocity and speed might be realised/communicated/translated through a variety of digital outputs. The guiding principle of the project is to investigate hyper-physical interfaces where the traditional notion of ‘user’ is supplanted by ‘participant-performer’. The designed objectile seeks to move people to performative interaction and play. To this end the emergent object will be installed in a number of different social contexts (e.g. a playground, a festival, a public space). How the piece is positioned in space and how spatiality impacts on people’s willingness to participate will be a central concern of the work.