It's an old-fashioned sewing circle, and yet, very much not. In SAM's Think Tank, on the second level of the old Venturi space (up past the stone camels and Jason Puccinelli's Cartoon Forest), visual artist Marie Watt will hand you a threaded needle, and ask you to sit for spell, and stitch. Watt will accept donations of wool blankets at this time, and she'll trade you: a wool blanket for one of her silk screen prints. The only catch: she'll ask you to tell your blanket's story on a manila tag. (And I asked, if you cannot give up that old mothball-eaten blanket of your grandmother's, you don't have to; a proxy blanket is OK. Just find a substitute wool blanket, and share the story of the original.) For Watt, these blankets are evocative. The wool itself seems to tell stories of its animal history, though perhaps for you the stories will be about camp or a long-since-forgotten aunt's house. Watt will open a conversation that begins with the idea of Custodian (the title of this project). As you weave your needle into and out of diamond-shaped pieces cut from donated wool blankets, the discussion is sure to meander. Watt is currently working on an audio component to this project, so perhaps in a few weeks, if you visit SAM on a day when Watt is not there to lead the conversation, you'll hear the words of previous sewers as they put their hands to this piece of art-in-progress. How often to you get to sit with an artist, pick her brain, and help her craft a new work? Seattle Art Museum 1300 First Avenue, 654-3100, . Free. Thursday, Aug. 2, 5:30-8:30 p.m.