"Little Boy":
I felt very sick at the scene that town people in the US overjoyed about the atomic bomb called 'Little Boy' which hit Hiroshima and wiped out the whole city.
However the movie "Little Boy" is a 'undoubtedly' great masterpiece.
Why? Because it talks about 'What is War' clearly and the description of Japan and the US on the war is very fair.
And also as a hero's journey of the boy its script is crafted very well. I think it well-made fantasy without authentic magics but with good tricks.
Please note that the nickname of the boy as a protagonist is also 'Little Boy.'