The cheese spread sandwich is the most forgiving sandwich a child can be handed, and that is its entire design. Soft processed spread, the Dairylea kind, goes straight onto soft white bread and that is the whole build. There is no butter, because the spread already carries its own fat; no second filling, because the point is one mild thing and nothing to negotiate; no crust to speak of, often, because it is made for someone small. It is soft on soft on soft, and the gentleness is not a failing of the sandwich but the reason it is made.
The craft is almost the absence of craft, which is itself the skill. The spread is mild and stable enough that it will not split, weep, or sharpen no matter how roughly it is assembled or how long it sits in a lunchbox, so the sandwich survives a school bag in a way a Cheddar sandwich does not. It spreads edge to edge with no dragging because the fat is worked through it, sealing the crumb lightly so the bread stays soft rather than drying out by mid morning. Pressed flat and cut into triangles or fingers, it holds together because there is nothing wet inside to make it fail. The honest version is plain bread and a generous scrape, made in under a minute, eaten without ceremony.
The variations are gentle by nature, because the format resists anything assertive. A slice of cucumber or a little grated carrot adds crunch without sharpness; a flavoured spread carrying chive or onion shifts the register slightly; the toasted version pushes the same spread toward the toastie family and changes the rules. The tub itself, the spread read from the pot rather than the loaf, is its own consideration. Each deserves its own article rather than being crowded in here.