MOCHA Drop-In Art & Potato Pageant. Spring-themed art projects for children of all ages, including prizes for best dressed potatoes. Noon to 4 p.m. March 23. Museum of Children's Art, 538 Ninth St., Oakland. $8 child. Free adult. 510-465-8770, mocha.org.
The Anything Goes Chorus. The Anything Goes Chorus brings jazz, Broadway, pop and a cappella tunes together. 7:30 p.m. March 23. First Congregational Church, 2501 Harrison St., Oakland. $5 -- $20. 510-350-8323, www.ellenrobinson.com.
Free Symphony Concert. The Prometheus Symphony Orchestra holds its fourth, free, family concert of the season, which features acclaimed young violinist Stephen Waarts. 3 to 5 p.m. March 24. St. Paul's Episcopal Church, 114 Montecito Ave., Oakland. Free. 510-409-3810, www.prometheussymphony.org.
Open Cockpit Day. Oakland Aviation Museum has planes open for inspection for its first Open Cockpit Day of the season. Food and beverages available for purchase. Noon to 4 p.m. March 24. Oakland Aviation Museum, 8252 Earhart Road, Oakland. $10 adults. 510-638-7100, www.oaklandaviationmuseum.org.
Gateway Park and the Bay Trail. Land will be returned to the community where the new Bay Bridge ends in Oakland. The League of Women Voters of Oakland hosts a discussion on how to get involved and who's working on the project. 6 to 7:30 p.m. March 26. California Federation of Teachers Office, 1330 Broadway, Oakland. 510-834-7640, www.lwvoakland.org.
Lake Merritt Weed Warriors. An informal, can-do group of volunteers who work with Public Works Agency staff to weed, mulch and prune parks around Lake Merritt. Volunteers gather in different spots, check Facebook page to confirm location. Gloves and tools provided. Bring own gardening tools if possible. 9 a.m. to Noon March 30. Lakeside Park, Lake Merritt, 468 Perkins St., Oakland, www.facebook.com/LakeMerrittWeedWarriors.
Old Fashioned Egg Hunt & Games. A Dunsmuir tradition continues with age-appropriate egg hunts, an opportunity to greet the Easter Bunny, games, animals and more. Bring your picnic, tour the mansion and enjoy the Estate. 11 a.m. to 3 p.m. March 30. Dunsmuir Hellman Historic Estate, 2960 Peralta Oaks Ct., Oakland. $5 adults. $4 kids. Free 3 and under. 510-615-5562, www.dunsmuir-hellman.com.
Spring Festival and Children's Easter Hat Parade. Lakeshore Avenue's 26th Children's Annual Easter Derby Decorating Contest and Parade also features Spring Festival egg decorating, prizes, refreshments, fun and more 10 a.m. to 1:30 p.m. March 30. Lakeshore Ave Baptist Church, 3534 Lakeshore Ave., Oakland. $2 hat purchase. Free. 510-593-3721, LakeshoreOakland.com.
Lakeshore Free Plant Exchange. Switch your own plants for others to create a new, instant garden. All types and sizes of healthy plants welcome, from small cuttings up to full size. Other items available. Noon to 4 p.m. March 30. Lakeshore Free Plant Exchange, 3811 Lakeshore Ave., Oakland. Free. 510-866-8482, www.plantexchange.wordpress.com.