If you’re in the San Francisco Bay Area this holiday season, be sure to visit The Tech Museum of Innovation for the world premiere of the most comprehensive exhibit of the innovative works of Leonardo da Vinci.  And don’t miss the IMAX film Adrenaline Rush: the Science of Risk, a skydiving journey from extraordinary heights that delves into the biology of risk-taking and the physics that make human flight possible. Your kids won’t even realize they’re being exposed to science, art, history, and social studies during their school vacation. The show is open through January 4, 2009.