The yarn bombers descended into the Elmwood district on Monday and left behind some colorful decorations. They also put yarn wraps around the Rose Garden last week. For more photos, look here.

The artist who calls herself Streetcolor said these yarn sculptures were inspired by the work of a glass artist named Klaus Moje. “I pick out a piece of an artist I like and duplicate their colors exactly,” she says on her blog. “This takes a lot of dyeing . Then I roll out balls of the colors and knit them.

Frances Dinkelspiel, Berkeleyside and CItyside co-founder, is a journalist and author. Her first book, Towers of Gold: How One Jewish Immigrant Named Isaias Hellman...