5) Multiple loci for interaction, trajectories and
placements. As we have described, any digital interactive
we were to build would need to coexist with many other
things. It would not be appropriate for digital pieces to
overshadow the other exhibition content, nor require ways
of engaging with them which were out of keeping. Thus we
avoided artefacts that were recognisably interactives
favouring an embedded computing and sensor-based
approach. Also, by carefully placing a number of devices
through the exhibition, we aimed for each piece to afford a
‘locus for interaction’ [10] within the visit trajectory [2].