Well, its an emotional animation ;) The movie presents the emotions of humans in a very cute way, there are different crews are working in our brain, each if them is taking care of different emotions in our brain, like anger, disgust, fear, sadness and joy. So these crews are actually working to keep the lil girl emotionally balance.
One of the very inspiring messages was we have always thought sadness is a kind of
negative emotions, and actually what negative is not that negative. Inside Out taught that sadness can bring loves to surround you and also joy eventually.
When the
pinky elephant bing-bong –* imaginary friend
of the lil girl during her childhood, which I guess every one of us had one * sacrifice
himself just to send Joy back to the head-quarter to ensure the lil girl’s happiness,
that was really heartbreaking. Ultimately, Bing-Bong has disappeared in the lil girl’s memory. Yeah, blissful childhood memories can’t last forever, but it’s actually not so bad.