Bay seniors with grandchildren who ask puzzling questions like, “Why does the wind blow?’ should escort them to the Exploratorium’s fresh air venue –on the waterside bluffs of Fort Mason. At the Outside Exploratorium they are continuing to add exhibits relating to what’s right in front of you – wind, surf, fog, sunshine. Open dawn to dusk. Free. Speaking of Fort Mason, the Geezer sees where it is going to have a major overhaul. I’m praying SF’s misguided preservationists don’t insist on keeping the U.S. army barracks architectural style. Look what a disaster that is at Lucas Films in the Presidio.