Voltenion’s review published on Letterboxd:
An allegory to growth and responsibility, seen through a real world issue in a very emotional film. Follow Jack, the 5 year old boy as he discovers that life is bigger than a room, that there's more out there that we'll have to live for but also be lucky to experience. The mother is there to ground the movie in reality and to remind us how complicated life both outside and inside the small room of childhood is.
This movie has two halves that the director didn't manage to maintain in the same level of quality, unfortunately. The sheer masterpiece of the first half pulls its weight to excuse the rather bland and predictable middle, with the ending being satisfyingly pleasant.
"When I was small, I only knew small things. But now I'm five, I know everything!"
The kid is fascinating and as he discovers more of the world outside room, reminds us of the wonder in life when you've lived very little of it. I would have hoped for a more experimental movie out of this discovery topic and less realism, but alas, it is what it is, and what it is is good enough to warrant a view by most movie fans.
Recommend the film if you enjoy: experimental films, the Allegory of the Cave by Plato, kids, dramas, crying.