Grandma graffiti. Guerilla knitting. Yarn bombing. Whatever you call it, this explosive new form of street art has become a global phenomenon. Join Wichita-area knitters for refreshments and a short presentation of recent guerilla knitting projects at 1 p.m. Saturday, May 19, in the McKnight Art Center west atrium sponsored by the Ulrich Museum. Stay to knit, chat and learn more about the fall 2012 yarn bombing of the Martin H. Bush Outdoor Sculpture Collection on the WSU campus. Free admission. http://www.ulrich.wichita.edu/events