FREE CuriOdyssey Museum at Coyote Point, noon to 5pm

I Found this on the San Mateo Patch:

CuriOdyssey Museum, 1651 Coyote Point Dr, San Mateo, CA 94401
Time: 12:00pm–5:00pm
Next on: Today, June 5, 2011
Free admission the first Sunday of every month at Coyote Point Museum. Parking is $5.

And the park is excellent too.
Website: http://www.coyoteptmuseum.org/

Phone: 650-342-7755
Admission by car to the Park is $5, otherwise free