Just a few more days to feel up Ernesto Neto’s squishy white sculpture-space and bounce Andy Warhol’s Mylar pillows around the room. Thin Skin:The Fickle Nature of Bubbles, Spheres, and Inflatable Structures, at the Bedford Art Gallery in Walnut Creek, also brings two works by the hot-hot installation artist Olafur Eliasson to the Bay Area. It’s a fun show, and a good one.