Set 43019 builds a soccer ball at almost exactly the size of the real thing, and the whole point of the object only appears when you pull its panels apart.

Closed, it is convincing at a glance and unconvincing up close, which is the right way round. The white discs and cyan-and-pink panels read as a match ball from across a room; step in and you can see the Technic skeleton holding the curve, six deco discs sitting proud of the surface, and the hinge lines that give the trick away. It stands 22cm and measures 21cm across, which is a size-5 ball to within a centimetre, on a small black base so it does not roll off the shelf.

Then the panels open. Inside is a stadium: a banked crowd printed onto the tiers, two big screens, a golden trophy at the centre of a green pitch, and a stage of player figures. Press the hidden button and the figures jump into a victory celebration while fireworks pop up behind them. It is a full mechanism, gearing and all, folded into a sphere — which is why 1,498 pieces goes somewhere you cannot see.

That ratio is the actual pleasure of the build. Most display sets spend their part count on the surface; this one spends most of it on the inside and then covers the inside up. You assemble a crowd nobody will look at unless you decide to show them, and the reveal only works because the outside is so plainly a ball.

The honest caveats are ordinary ones. LEGO puts it at ages 10+, and $129.99 is display-piece money rather than toy money — it does not bounce, it does not kick, and the base exists because a sphere on a shelf is a bad idea. It is also, unavoidably, a set you show people rather than one you play with: the celebration button is a party trick with a very good punchline, and a party trick all the same.

MoMA Design Store carries it, which is a reasonable read of what it is. The engineering is the object, and the football is the wrapper.