And he's got it. Although he's still in junior high, his acting resume is already as long as the Taliban section of Santa's "naughty" list. This is a kid who did a stand-up comedy routine for the school talent show . . . when he was 6. And provided his own rimshots on a small snare drum. Since then he's had roles in numerous children's theater productions and one or two at the grown-up level as well. Derek appears in the Tim Allen comedy "Joe Somebody," opening Dec. 21 at a theater near you.