I think Boy’s habit of playing with plain white Lego is one of those small details in the show that says far more than it first appears. On the surface, it looks like simple fidgeting in the scene we most clearly see him with them, it's a restless mind needing something tactile to occupy itself with as he watches different things. But the choice of only white bricks, and the way he uses them, hints at something deeper in my opinion.
White Lego could be said to resemble bones, although this point might be my biggest stretch so bare with me. Boy, who literally prints synthetic bodies for the hybrid children, may be unconsciously echoing that process in miniature, building skeletons/parts, or at least prototypes of them. The bricks become mock ups, not in a traditional “building a set” sense, but as loose, abstract gesture towards eventual structure. He’s more invested in the process than the end product. He builds, unmakes and reshapes because it’s not about completion for him, it’s about rhythm, control, and repetition.
That repetition itself is stabilising for him. White Lego is predictable, all the same colour, the same texture, the same form. Unlike a mixed pile of random pieces, which could be overwhelming, a set that's all the same creates order. He doesn’t need to worry about having the “right” shape or colour, everything works together by default. For someone as overstimulated and chaotic minded as Boy, that predictability is soothing. It’s a way of containing his own mental chaos in a clean, controlled system.
The colour choice also carries symbolic weight. White suggests purity, sterility, and blankness, a reflection of the clinical “too clean” world he’s built around himself. Maybe the Lego represents parts of a whole he can’t quite complete, which is why his structures often look like messy towers or unfinished forms with gaps. He’s grasping toward a shape he feels but can’t define. In that sense, his Lego play becomes a kind of subconscious expression, not childish distraction, but a silent way of feeling and externalising what he can’t put into words.
In the end I think Boy’s play with white Lego is both a fidget and metaphor. It’s grounding, structured play that soothes his overstimulated mind but it also symbolises the things he builds, the sterile world he lives in, and the gaps in himself he can’t quite resolve. It’s an activity he can return to endlessly, alone, without the risk of it being ruined, because it belongs fully to him, as predictable and unfinished as he is.
The use of pure white Lego really interests me. Here are my theories on why but I did write this on the 23/8 so not as updated to current episodes. My asks are open if anyone wants me to do an analysis on a specific part of Boy or on another alien earth character! Or just any questions in general 🤧