Energy Ring, Science Museum, London, 2007.
© Science Museum / Science & Society Picture Library
This enormous interactive sculpture hangs in the space next to the Energy Gallery. As well as being a fascinating artwork, it also displays the thoughts of those who enter answers to questions about energy such as whether we should have energy-free days, or what flavour electricity might be. Comments are entered at one of the four touch-screen terminals in the gallery, and visitors can see their answers, together with their names, in the LED display on the Wheel.