1993 anime television film directed by Tomomi Mochizuki

In the final months of World War II, 14-year-old Seita and his sister Setsuko are orphaned when their mother is killed during an air raid in Kobe, Japan. After a falling out with their aunt, they move into an abandoned bomb shelter. With no surviving relatives and their emergency rations depleted, Seita and Setsuko struggle to survive.

1979 film directed by Hayao Miyazaki

A young boy is tired of the city and escapes into the country. Two strangers trade him a strange seed. The boy accepts and the seed sprouts into a miniature planet, which continues to grow.