If your student plays an instrument, the JCC has an opportunity for them to hone their skills, play brand new music and experience the thrill of performing in a live production. The music is fun, creepy, dramatic, hilarious and all-original, accompanying the JCC Youth Theatre’s spoof of the Harry Potter Series, “Riddikulus: a Magical Musical.” You must bring your own instrument to participate and have at least one year of experience. Rehearsals are from 2 to 5 p.m. Sunday afternoons at the Fox Building at 16801 Baxter Road in Chesterfield, beginning Sunday, Sept. 18.  For more information or to register, contact John Wolbers at 314-442-3239 or [email protected].