Experiment with Marble Speed with the Gravitrax – Expansion Looping Set! Turn the marble upside down with the Loop accessory. Experiment with how much speed the marble needs to loop-the-loop. This GraviTrax® accessory also includes 6 additional tracks. Contents: Instructions (D, F, EN, NL, E), 1 long track, 2 medium tracks, 3 short tracks Please Note: This Expansion Pack requires the GraviTrax® Starter Set (sold separately & subject to availability). Suitable for ages 8 to 99 years
