Oscar Shorts Finder

The Sand Castle (Le château de sable) is a 1977 stop motion animated short created by Co Hoedeman for the National Film Board of Canada. It won the Academy Award for Best Animated Short Film at the 50th Academy Awards.
— Wikipedia

Doonesbury is a comic strip by American cartoonist Garry Trudeau that chronicles the adventures and lives of an array of characters of various ages, professions, and backgrounds, from the President of the United States to the title character, Mike Doonesbury, who has progressed over the decades from a college student to a youthful senior citizen. Created in "the throes of '60s and '70s counterculture", and frequently political in nature, Doonesbury features characters representing a range of affiliations, but the cartoon is noted for a liberal viewpoint.
— Wikipedia

Jimmy the C is a 1979 animated short film, directed by Jimmy Picker and co-produced by Picker (going by James), Robert Grossman and Craig Whitaker. It was nominated for an Academy Award for Animated Short Film. The film was preserved by the Academy Film Archive in 2009.
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Bead Game (French: Histoire de perles) is a 1977 animated short film by Ishu Patel, created by arranging beads into the shapes of real and mythical creatures, who absorb and devour one another, thus, evolving into scenes of modern human warfare. Jnan Prakash Ghosh provides music for the 5 min 35 second film, which was produced at the National Film Board of Canada. The film's technique was inspired by the beadwork of Inuit women. The increasing aggression shown by the creatures in Bead Game was intended as a cautionary tale about human hostility and nuclear weapons.
— Wikipedia