GraviTrax PRO Action Pack TurntableThe GraviTrax PRO Action Pack Turntable is an expansion item that can be combined with the GraviTrax Starter and Pro Set. More control over the paths of the ball! With the turntable, passing balls rotate a mechanical turntable. As a ball rolls down through the tile, it changes direction and at the same time reverses the turntable. This allows for more trajectory variation and control over the ball's paths. Combined with a starter set, complex routes