The images in “Better Out Than In” are accompanied by a loopy audio guide, accessed by calling an 800 number that appears beside the stencil. (Dial 1-800-656-42

The images in “Better Out Than In” are accompanied by a loopy audio guide, accessed by calling an 800 number that appears beside the stencil. (Dial 1-800-656-4271, ext. 1 for this one.) “This piece is typical of Ban-sky’s output,” the guide says. “The children in this case represent youth, and the sign represents – well, signs.”