Below, you'll see any text that was highlighted with comments from the reviewer.
I loved how the story changes its focus from a simple, seemingly insignificant box to the motivation and inherent value of art - even though it may a deep idea, it also highlights the importance for children to begin appreciating art.
The message of the story is very clear. Perhaps more descriptions about the details of the box - how big it is, what colour or material the box is made up of - will aid the visualisation of a box on a table, unless there will be illustrations accompanying your piece.
I love how you linked a compelling, timeless (yet controversial) idea via the medium of a children's story with a mere box. To me, that mirrors the intended effect of The Little Prince (which, if I recall correctly, is one of your favourites?) about truths and simple yet significant ideas. Reading your piece inspires me to want to try exploring the less comfortable but nonetheless important ideas in different mediums - maybe even the least expected ones! ;-)
I truly enjoyed the idea and theme of this piece. It taught me that no idea is too complex to be broken down into simpler parts, even "what is art?" or "is there value in being an artist?" (of course!)
A suggestion would be to relook at the tenses and see if they can somehow better help bring across the idea you wish to convey. Maybe they can be arranged or edited differently to lend fluidity to the transition of the different scenes, or even to link them together.
I felt like the plot twist was somewhat too quickly introduced and hence predictable; perhaps you can describe the young artist toying with different ideas before he settles on the final one - but of course, this is entirely up to you!
I can see this being shortlisted as one of the winning entries xD and I wish you all the best in the competition! Happy writing ~