I like the Lego movies too, specifically the cinematic ones. I think that one of the best things about them is how they work of kid logic, either with how characters act, and on story beats in a way that feels a little like it can be a commentary on the sort of story it is doing. It was a nice twist how the Lego movie did a sort of twist reveal to maybe explain why the story was like this, some context into how the sort of universe of living Lego pieces work. Not ashamed at all to say that I cried towards the end of The Lego Movie, because I don't think that I had as strongly seen a story have the hero giving back the power of the chosen hero to everyone before, taking an empowerment story, and saying everyone gets it because everyone is special. Even giving it to the villain, a sort of dual character who is allowed to see that he is the villain in someone else's story, doesn't like that and is allowed to be the one that changes so that everyone moves on.
Since you have not seen the sequel, I won't spoil it, but it did something pretty cool with the villain thing. Simple like a kids movie, but also complexity and things that kids could probably internalized. I liked how musical bits are not really in line with the first one, and paying attention you can pick up characterization outside of the narrative. One of the big themes I think is important is "perceptions".
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Through dream I travel, at lantern's call
To consume the flames of a kingdom's fall