Setting: in a future or a symbolized world
Conflict: the society and the environment (the family) do not accept the lost thing live near them.
Climax: a distinctively new world appears in front of the characters after a long journey
Symbol: the lost thing implies there are some living things that are either not being taken care of or alienated from the modern society, and I think it symbolizes unaccepted feelings or thoughts of people which are not treated appropriately due to prejudices and common thoughts that a society or a culture possesses
Irony: the person who led the lost thing to its place starts not seeing the lost thing as time passes
Theme: even though one thing look strange or weird, it has a place where it belongs to, and you must not abandon it but to treat it well and lead it appropriately as it needs.
