MANILA, Philippines - Greenilda vs. The Litterbugs: A Halloween Family Concert featuring the Metro Manila Concert Orchestra (MMCO), led by Josefino Chino Toledo, is set for tomorrow, Oct. 30. Teach your kids about orchestra music and about saving the environment with pre- and post-concert activities like trick-or-treat, costume parade and competition, and instrument petting zoo. Greenilda vs. The Litterbugs begins at 2:30 pm at the lobby of the Little theater and a visit to Greenilda’s Green Forest and the Musical Instruments Petting Zoo where kids can join MMCO members and play with their instruments. They move to the main theater for trick-or-treat and enjoy goodies from Alveo and REX BOOK STORE...and then enter the Main Theater at 4 p.m. when the MMCO will treat them to the halloween musical. For tickets, call 832-1125. Students enjoy a 50 percent discount and seniors 20 percent. Orchestra tickets are priced at P800, lower box at P5,000.