You don’t have to be a farmer to have a hay barrel of fun at the fourth annual Agrarian Games this weekend. The Farmers Guild hosts the event, but it’s open to city slickers and anyone interested in sustainable community agriculture. In addition to a farmers market full of fresh, locally grown and raised fruits, vegetables, meat and more, the day boasts competitions in butter churning, hay bale tossing, watermelon seed spitting and other activities. There’s also live music by the Hubbub Club, Oddjob Ensemble and others, interactive artwork, information booths and family fun on Saturday, Sept. 16, at Petaluma Fairgrounds, 175 Fairgrounds Drive, Petaluma. Noon to 6pm. $10–$15; kids under five are free. farmersguild.org.