British artist Lucy Sparrow hand-sewed more than 20,000 felt groceries, cosmetics, and household goods and arranged them into a walk-through 1980s-90s supermarket you can browse aisle by aisle — one she modeled on a Walmart, now staged in Walmart's own home town. It is her first museum show in the United States, and it arrives with a felt replica of her own studio, the 'Felt Cave,' plus a documentary she made herself. Free, in the Galleries, from July 18.