Got a supercalifragilisticexpialidocious kid who can sing, dance and act? Then hustle them over to the Studio Dionne School of Dance and Music on Sunday, April 23 for a MARY POPPINS CASTING CALL. Disney on Broadway is seeking children 8-12, no taller than 58 inches, to play Jane Banks (11) and Michael Banks (9). Sign in at 2 p.m.; auditions start at 3 p.m. Must bring sheet music, a current head shot and résumé. www.disneyonbroadway.com. www.studiodionne.com.