You and your child are locked into two seats attached to a giant log that slowly turns. Think of those noisy gas cars at Disneyland. You know, the ones where people can pretend to drive but can't really because of that big giant iron bar anchored to the roadway below. Anyway, Legoland has better cars and no bars, but lots more rules. With everyone belted in, a remote control activates the electric motors and the kids are driving.
Younger kids get to drive the same cars, only on a very short oval and very few at a time.
Lego Sky Patrol. Kids strap into planes that then go around in a circle and up and down, with the latter motion controlled as the drivers pull on a joystick. The Royal Joust. Imagine the best rocking horse you had. Put it on rails and send it lightly bucking through a Lego forest.