Ravensburger's interactive marble run system. The magnetic Stick helps you remove marbles from hard-to-reach places in the track, without touching rails or other building components. With the GraviTrax® marble run system, you can playfully discover gravity, and with various expansions, it can be extended for limitless building and playing fun! Add even more speed with the expansion sets. Contents: 1 Magnetic Stick, 1 silver marble. Age 8+. Packaging 11x11x6cm. Not suitable for children under 36 months.