PRE-SCHOOL—A class for 18-month old children will be offered starting today by the Silverman Preschool of Tifereth Israel Synagogue, 6660 Cowles Mountain Blvd. Preschool director Yael Edelstein may be contacted for tours of the facility at (619) 697-1948.

CONCERT—The music of George Gershwin will be featured as part of the free 19th Annual International Summer Organ Festival at 7:30 p.m. at the Spreckels Organ Pavilion at Balboa Park. Performance will feature Carol Williams organist; Clark Sterling, baritone; Stephanie Rhoads, sorano; Michael Jordan, alto. www.sosorgan.com