Settings
In a city by the beach, probably in near future.
Conflict
The Lost Thing VS Society
Point of view
First Person
Climax
The Lost Thing and the boy find the place where it belongs.
Symbol
The paper given by the company is the symbol of systematic world.
The sign is the symbol of destination.
The Lost Thing is a symbol of people's lost feelings from busyness.
Irony
Although the boy found the best place for the Lost Thing, he couldn't see them anymore.
Theme
I think the animation wants to tell us that we miss many important things living in busy life.
The Lost Thing is a huge object, all though the boy was the only one noticing and taking care.
Even we are living in fast world, we shouldn't be unconcerned.