Let's all put our heads together -- literally. "Make a Skull" is part of the Academy of Sciences' larger "Skulls" exhibit, home to 1,700 former animal heads. Though 864 of them are sea lions, the range of braincases is astounding. Skull with purple teeth? Check. Extinct species' skulls? Check. Human skulls? Totally! After examining the dead guys, kids can make a clay model complete with moving jaws. Get a head starting at 12:30 p.m. at the California Academy of Sciences, 55 Concourse in Golden Gate Park, S.F. Free with museum entrance (free-$8.50); call 750-7348 or visit www.calacademy.org.
-- Hiya Swanhuyser
Walking the Dog
The string's the thing
In what scenario can a person rock the baby, go over the falls, and reach for the moon with a man on a trapeze, all after a quick sleeper? If you said, "Under the influence of severe mind-altering hallucinogens," you're way off. It's time to blow the cobwebs off your Duncan Imperial and join the throng of atom-smashers and loop-the-loopers at the eighth annual California State Yo-Yo Championships. The American Yo-Yo Association (yes, there really is one -- with a board of directors and everything!) brings together pros and amateurs to compete, armed with a dizzying array of flying plastic projectiles on strings. Haven't touched your Butterfly since childhood? Can't remember how to do the cow wrap combo? Oil up your string and make that monkey climb! Climb, monkey, climb! The spin begins at 11 a.m. at the Cannery, 2801 Leavenworth (at Beach), S.F. Admission is free; call 771-3112 or visit www.thecannery.com.
-- Kevin Chanel
On the Road
Cars are dangerous, especially with teenagers in control, but some good training -- that is, more than a few turns around the parking lot with Dad in the passenger seat pressing the invisible brake pedal and yelling, "Stop!" -- can help. Driver's Edge wants to make it easier for teens to get behind the wheel without putting themselves and others at risk, so the nonprofit driver's ed program is now making a tour of major cities around the country. At the San Francisco stop, licensed drivers aged 15 to 21 will receive free individual professional driving lessons, during which they'll learn defensive driving skills such as evasive lane changes, anti-lock and panic braking maneuvers, and skid control. The wheels start rolling at 8 a.m. at Candlestick Park, 602 Jamestown (at Harney), S.F. Admission is free, but students must preregister; visit www.driversedge.org.
-- Joyce Slaton