The lost thing

Symbols:
1.The lost thing--People who don't fit into this society
2.The industrialize society--Our plain boring life
3.Bottle top--the left pure naivety in boy
4.The world behind the door--An idea colorful world with enjoyment and no stress of pressure to live
5.The big gray building--where people used to dump their last pure naivety at because they were told to
Theme(messages):
It's like the book the little price, this is a film for grown-ups who used to have a colorful childhood and then grow bigger and becomes a boring adult who can not afford play but to take responsibility of live.
The little boy used to collect bottle tops when he still has the pure heart and the ability to enjoy the time spend on "meaningless thing", but then he grown up worrying about being found by his parents so he found this place and left his naivety out at that world behind the door and become a adult which he has to.
To be a adult doesn't mean we have to give up the ability of dreaming and playing, even though life could be hard sometimes but don't forget to retract your naivety after all.