Junior OdysseyWill VisitCosta RicaThe cacao manufacturing plants of Costa Rica, where cocoa and chocolate are made from the cacao bean, will be the locale of today's Junior Odyssey trip, broadcast from the studio of the Allan Hancock Foundation at 1:15 pm. over KHJ and the Don Lee network.The program is for the Don I-ee School of the Air. produced by the SC radio division on request of Van C. Newkirk. KHJ program director and originator of the School of the Air.Edda Urrea. A1 Seale, and Nancy Thompson will fill the roles of the travelers.Dr. Clarence H. Cleminshaw. SC assistant professor of astronomy and assistant director of the Griffith observatory, will explain phases of astronomy puzzling to the layman in the Laboratory Echoes program, heard over KRKD at 1:30 this afternoon.-Laboratory Echoes Is also produced by the SC radio division with t H. Spencer Sussan as director.Bill Jones, new commentator, will Interview Dr. Cleminshaw. and Jane Sullivan Is today's script writer.