LEGO Iconic Ferris Wheel (31389)

As a display piece the Ferris wheel works because the designers cared about the negative space. The spokes are thin enough to read as a real wheel rather than a solid disc, the cars hang and gently level as it turns, and the whole thing sits on a base compact enough not to eat your whole shelf. It photographs well and it catches the eye from across a room, which is the entire job of a set like this.

The rotation is the make-or-break, and it is smooth. The hand crank drives the wheel through a simple gear-down so it turns at a believable pace rather than spinning like a fan, and the cars are weighted to stay upright. It is the kind of satisfying-to-fidget mechanism that keeps a display build from becoming wallpaper, you will spin it every time you walk past for the first week, and probably long after.

The 3-in-1 alternates are a carousel and a swing-ride, and both are honest builds rather than token filler. The carousel reuses the rotation mechanism cleverly; the swing-ride is the weakest of the three but still stands on its own. As always with 3-in-1, the value calculus assumes you will only display one at a time, but having genuine alternates raises the parts' usefulness considerably.