Examined effects of interfering information and instructions to forget on preschoolers' and kindergartners' story retention. Found that retroactive interference affected preschoolers' storage- and retrieval-based forgetting rates and kindergartners' storage-based forgetting rates. Intentional forgetting reduced retroactive interference primarily by attenuating storage-based forgetting. Effects of forgetting instructions varied by age. All children recalled the to-be-forgotten story and the to-be-remembered story equally well. (Author/KB)