The Ravensburger GraviTrax Lift Extension brings extra dynamics to your marble run system. With the manually operated lifter, you transport the marbles to a higher level to unlock new track sections. In addition to the transparent lift, the set includes seven silver marbles, height tiles in two different sizes, and flexible plastic tracks. This extension can only be played in combination with a GraviTrax Starter-Set. It is ideal for flexibly expanding existing marble runs and overcoming new height differences along the course.