Free bike helmets, carnival games and clowns? Yep, grab a bike and hit the 2009 Berkeley Family Festival and Bike Rodeo this Saturday, June 20 from 11 a.m. to 3p.m. at Berkeley’s San Pablo Park. Kids can ride the mock-city obstacle course, get their bikes checked out at the bicycle maintenance stations, watch live entertainers and play games. Run through the interactive safety seminar, and there’s a free bicycle helmet in it for you, too.