The foyers of Sadler's Wells were filled with balloons, bunting and all kinds of child-friendly activity for its Family Weekend. Children could make wigs, cut out silhouettes, and join in country dancing. It was all very jolly. The spur for such activity was a new version of Rapunzel by choreographer Liv Lorent, for her Newcastle-based balletLorent. It has a text by the Poet Laureate Carol Ann Duffy and stark, skeletal designs by Phil Eddells. It's quite beautiful, but grim as well as Grimm - and there were moments when all the cheery children looked slightly shell-shocked. This goes to show how difficult it is to build a fairy-tale dance piece that will entice children and entertain adults, simultaneously satisfying modern perceptions of the underlying psychology, while allowing the simple drive of the narrative to shine through. Lorent and Duffy have fixed on the fact that the Rapunzel story is at bottom the tragedy of two women longing for a child. A wife's obsession with eating the rampion in a wicked witch's garden makes her husband steal it for her; when he is caught by the enchantress, he agrees to give his child up to her - because she too is lonely.