Threshold devices present information gathered from the home's surroundings to give new views on the domestic situation. We built two prototypes of different threshold devices and studied them in field trials with participant households. The Local Barometer displays online text and images related to the home's locality depending on the local wind conditions to give an impression of the sociocultural surroundings. The Plane Tracker tracks aircraft passing overhead and imagines their flights onscreen to resource an understanding of the home's global links. Our studies indicated that the experiences they provided were compelling, that participants could and did interpret the devices in various ways, that their form designs were appropriate for domestic environments, that using ready-made information contributed to the richness of the experiences, and that situating the information they provided with respect to the home and its locality was important for the ways people engaged with them.

This paper presents the development of a lightweight component model that allows user to manage the introduction and arrangement of new interactive services and devices in the home. The model is responsive to ethnographic studies of the interplay between the Space-plan or interior layout and Stuff or artefacts placed within the fabric of the home. Interaction techniques developed through user-participation enable household members -- rather than designers -- to configure and reconfigure interactive devices and services to meet local needs. As a result, we have developed a tablet-based editor that discovers available ubiquitous components and presents these to users as 'jigsaw pieces' that can be dynamically assembled and recombined.