Youngsters between 8 and 17 who are interested in participating in the Eighth Annual Greater Los Angeles Soap Box Derby are urged to attend the final free car building clinics on May 19, from 9 a.m. to 1 p.m. in the rear of the La Cañada Sport Chalet on Foothill Blvd. Help in building the cars will be available from expert Kiwanian and California Family Soap Box Derby Association volunteers, who will also answer any questions. Car kits are available from Kiwanian Jack Dawson (818) 790-6592. The annual event, which is presented by the La Canada (noon) Kiwanis Club and the California Family Soap Box Derby Association will be held in La Canada, on June 2, on Michigan Hill. For more information contact Race Director Joel Smith at 790-6418.