Bernie Lubell might forgive me for interpreting his humble-tech works as a caution to people confident that the world can be dominated with American weapons. Lubell’s handmade wooden contraptions insinuate the fragility of life, the pitfalls of technology, and the perils of miscommunication. They’re also funny, just a little bit sexy, and highly interactive. You have until March 9 to see them—and a terrific installation by Sheri Simons—at the Bedford Gallery in Walnut Creek.