Children’s entertainers Judy & David, those multimillion-unit-shifting, Juno-winning stars of such recordings as Livin’ in a Shoe and Rock N’ Roll Matzah Ball, hop off their little yellow bus at the Orpheum on January 14. There, the duo will team up with VSO assistant conductor Ken Hsieh for a Symphonic Adventure, an hourlong interactive show introducing wee kids to the workings of the orchestra. Best to start ’em young, before they’ve heard of anything like the Pussycat Dolls.