GraviTrax Go: Rotative is a grab and go way to dive into the GraviTrax world without committing to a huge layout right away. The set includes base plates, track, height tiles, special spiral elements, and three marbles so you can build a complete course right out of the box, then rebuild it in new ways as you learn how speed, height, and angles change each run. It also clicks together with any other GraviTrax sets later, so this can be your first system or a compact add on for more vertical, twisting action.