Astronomically and weather-wise, spring seems to have arrived. And the East Bay Regional Parks have scheduled lots of programs and activities to celebrate.

Crab Cove Visitor Center in Alameda will "splash into spring" with a whole day of family-friendly activities from 10 a.m. to 4 p.m. Saturday. Crafts, games and live music are first on the agenda from 10 to 11:30 a.m. The egg hunt is at 11:30 a.m. Then from 1:30 to 2 p.m. there's a bay diorama program. From 2 to 3 p.m. it's low tide exploration time, and from 3 to 3:30 p.m. the staff feeds the fish in the center's large aquarium.

Splash Into Spring is sponsored by the East Bay Regional Park District, the Alameda Recreation and Parks Department and the Alameda Rotary Club. Admission is free; if it's raining the event will be postponed until March 30. Crab Cove Visitor Center is at 1252 McKay Ave. off Central Avenue in Alameda. For information, call 510-544-3187.

TAKE THE FAMILY: Family-friendly activities are also on the agenda during the weekend at Tilden Nature Area in Berkeley. There's a family nature ramble scheduled for 10 to 11:30 a.m. Sunday, led by naturalist Gail Broesder. It's an easy walk starting at Tilden's Environmental Education Center.

Hard-boil some white or brown eggs ahead of time, then bring them to the center for an egg dyeing session from 1:30 to 2:30 p.m. the same day, using natural dyes and hosted by interpretive student aide Morgan Rani Evans. Registration is required for the egg-dyeing program, and there's a fee of $6 per person ($8 for nondistrict residents). To register, call 888-327-2757 and select option 2.

Then from 2:30 to 4 p.m. Sunday, Gail will preside over a program at the adjacent Little Farm, during which you can make a keepsake out of wool, corn and other natural ingredients. The center and farm are at the north end of Tilden's Central Park Drive. For details, call 510-544-2233.

SHORELINE STROLL: There's a naturalist-led stroll along San Leandro Bay at Martin Luther King Jr. Regional Shoreline scheduled for 10 to 11:30 a.m. Sunday with a chance you'll spot lots of shorebirds and other marsh life. The walk is free of charge. Meet at the Tidewater staging area, which is located off Tidewater Avenue in Oakland. For information, call 510-544-3187.

Ned MacKay writes a regular column about East Bay Regional Park District sites and activities. Email him at nedmackay@comcast.net.