MS semi SA of mother chimpanzee using stick as tool to pound nuts open as baby chimp hangs on jungle vine and occasionally jumping down for a nut from mother. MS RA of baby chimp hanging from branch where mother sits, her leg dangling down, baby playfully chewing on it. MCU FA of mother chimpanzee partially hidden by foliage, using stick as tool to pound nuts open, baby watching and trying to imitate. CU SA of adult chimp using small branch as tool to scoop out food. (41024)