Some people might get it in the wrong way but i think the movie tells us to cherish and enjoy our childhood and becomes apart of our life to be a memorable childhood that we have. Later we get older and depression sadness problems fill our minds but we should remind ourself that we could be the young us again and live happily and later rejoice for what a beautiful life we have. Even in the movie the old peoples also became happy in the ending scene. The movie also tells us to live every moment of the beauties and wonders of every corner of the world