1. What's the main Idea
There are no boundaries that could limit imagination and free will, and nothing can stop or crush them, regardless of how society or even the authorities may try.
2. What is going on
So honestly speaking, I am having a hard time trying to understand what is going on in this animation, especially in the last part. However, one thing that is clear to me is that the government or society is trying to forcefully suppress the boy's imagination and impose its beliefs on him. Despite this, the boy is resilient and refuses to give up his imagination.
3. What happened in the end
I'm not 100% sure, but it seems like the boy in the animation initially succumbed to the pressure of the authorities. However, he managed to break free from their grasp and defended his imagination ability. As a result, the authorities eventually gave up on trying to suppress his imagination. I think it is trying to show strength and resilience of human spirit and the power of imagination.