Birds of a Feather. Celebrate Earth Day 2013 with a hands-on workshop about the birds of Lake Merritt. Activities include painting workshops, art activity stations. 11 a.m. to 2 p.m. April 20. Junior Center of Art and Science, 558 Bellevue Ave., Oakland. $4. 510-839-5777, www.juniorcenter.org.
Rhododendron Flower Show & Sale. Flower show and plant sale of the American Rhododendron Society. 10 a.m. to 4 p.m. April 20 and April 21. Lakeside Garden Center, Lake Merritt, 666 Bellevue Ave., Oakland. Free. 510-582-3404, www.CalChapterARS.org.
Earth Day Festival. Enjoy free popsicles from a solar powered ice pop truck; sustainable living exhibits focusing on food, waste, composting, alternative transportation; an interactive craft station for children; gardening and homesteading activities; cooking demonstrations and more. 9 a.m. to 2 p.m. April 21. Jack London Square, 70 Washington St., Oakland. Free. 510-645-9292, www.jacklondonsquare.com.
California Writers Club Meeting. Berkeley Branch of the California Writers Club present Lloyd Lofthouse, prize-winning author and self-publisher of novels, speaking on, "You Can Be Published." 2 to 4:30 p.m. April 21. Oakland Public Library, Main Branch, 125 14th St., Oakland. Free. 238-3134, www.cwc-berkeley.org.
Chemicals in Everyday Products. The League of Women Voters of Piedmont and Piedmont Connect host a free community event featuring Tracey Woodruff, PhD, MPH, of the University of California at San Francisco, discussing chemicals and metals in common household products that have the potential to create health hazards, and the most effective approaches to prevention and how public policy impacts environmental exposures. 7 to 8:30 p.m. April 24. Beach School Auditorium, 100 Lake Ave., Piedmont. Free. 510-835-9227, www.lwvpiedmont.org.
Author Stephanie McCoy. Local writer Stephanie McCoy reads from her acclaimed first novel "Sweet as Cane," a tale of a young disfigured woman growing up in a town that oozes with despair, hope and desire. 7 p.m. April 25. A Great Good Place for Books, 6120 La Salle Ave., Oakland. Free. 510-339-8210, www.ggpbooks.com.
Public Blood Drive. The American Red Cross holds a public blood drive. 8:30 a.m. to 2:30 p.m. April 25. Kaiser Center, 300 Lakeside Dr., Oakland. 800-733-2767, redcrossblood.org.
Heart of the Home Tour. Children's Support League's silver anniversary Heart of the Home Tour features five pedigreed architectural jewels, including a Tudor mansion by Hearst Castle architect Julia Morgan; an Albert Farr Georgian Colonial; a William Schirmer French Normandy; a Newsom & Newsom Traditional; and an award-winning, Platinum LEED Mid-Century Modern. Also, food trucks and boutique. 10 a.m. to 4 p.m. April 26 and April 27. Piedmont Community Hall, 711 Highland Ave., Oakland. $45 in advance. $50 day of event. 510-338-4521, www.ChildrensSupportLeague.org.
Lake Merritt Weed Warriors. An informal, can-do group of volunteers who work with Public Works Agency staff to weed, mulch, and prune at the parks around Lake Merritt. Gloves and tools provided, but feel free to bring your own. The group meets at various spots around the lake, check the facebook page for exaction location. 9 a.m. to Noon April 27. Lakeside Park, Lake Merritt, 468 Perkins St., Oakland, https://www.facebook.com/LakeMerrittWeedWarriors.