Artist Esben Weile Kjær builds a miniature castle at Amant

In East Williamsburg, on a stretch of low brick and concrete warehouses, a pale-gray castle slightly taller than a bouncy house rises from the center of a paved lot. This is SHELL, a sculpture commissioned by the nearby art center Amant, which calls it an “interplay of toy and fortress.” It was dreamed up by Esben Weile Kjær, a 33-year-old Danish art star. Reed thin and blonde, with the slouch of a weary royal, Kjær spent Tuesday afternoon directing his troops: five amateur dancers, recruited from clubs, who will perform at an