With the radical make-over of the creekside park between the Boulder Public Library and the Municipal Building completed, a Grand Opening celebration is called for. On Sunday, May 6, 11 a.m. to 2 p.m., join the fun with all manner of FREE activities in the Civic Area including games on the newly expanded lawn and live music from the Mountain Collective and the House of Joy. Hungry? Visit the food trucks. Central Park West, 1056 Canyon Blvd., Boulder.