If you’re spending this Labor Day weekend in our nation’s capital, stop by the Smithsonian Castle, which, along with the surrounding gardens, is presently ensnared in a thicket—approximately six miles worth—of cherry red yarn. The yarn bombing, revealed today (after two weeks of work by some 120 volunteers) and up through Tuesday morning, is a crafty way to draw attention to the Chiharu Shiota exhibition that opens tomorrow at the Freer Gallery of Art and Arthur M. Sackler Gallery. The Japanese artist has used 350 donated shoes and four miles of the same shade of red yarn used in the yarn bomb to create an installation that amasses personal memories of lost individuals and past moments. “The threads are woven together,” Shiota has said. “They become entangled. They tear. They unravel. They are a mirror of the emotions.” As for the fate of the post-bomb yarn, the Freer|Sackler is open to ideas: tweet your idea(s) to @FreerSackler or post the museum’s Facebook page.