Will an 'ambient information display' change peoples behaviour within a building? The 'Clouds' research investigation project in The Open University's Jennie Lee building strives to answer this question. This video takes a look behind-the-scenes of the project, which involves an artistic installation of grey and orange balloons which have been produced in the building to signify the number of people using the lift or taking the stairs. The grey balloons represent the stairs, and the orange balloons, the lift. Strategically placed pressure-pads throughout the building are used to monitor this, with the figures displayed electronically in the building's entrance. The Open University's researcher William R. Hazlewood, talks us through the Clouds project.