LEGO offers smaller amusement park builds through its LEGO City branding, but the Fairground-branded rides are adult builds that lean heavily on ingenuity, like many of the best LEGO sets for adults.

The new LEGO Loop Coaster is a massive thrill ride with a vertical, 90-degree drop and two inversions. It is the latest entry in LEGO's "Fairground" collection, and it is an impressive spectacle, ...