I really recommend a visit to the Hepworth Gallery to see Anthony McCall’s new 'solid light' installations. He uses projected light and a thin mist, to create 'sculptural forms in space'. We ended up spending almost an hour just interacting with it and it was brilliant to see how we then became part of the art too. You can do your very own Close Encounters of the Third Kind impression! We kept instinctively ducking our heads thinking we'd bang them on what is simply light and mist. Was a really fun and relaxing experience too.