9 a.m. to 4 p.m., Clark College, Gaiser Hall, 1933 Fort Vancouver Way. Green Neighbors DIY Fair offers variety of introductory workshops on topics from home weatherization to yard and garden maintenance. Free. Clark Public Utilities will exchange up to six of your old CFL bulbs for fresh ones. * www.clarkgreenneighbors.org/happenings/diy-fair.