Have we become too protective introducing children to difficult art? “I do worry about exposing children to literature, films and theatre before they are ready – and I am particularly jumpy about violent films. But how do you decide when a child is ‘ready’ for a film? It is fascinatingly ambiguous. The extraordinary thing is that works of art – especially books – change according to age. A book read at 18, reread at 48, may seem entirely different. Age is part of what we bring to a work of art.”