Ravensburger 27595 Gravitrax Trax Kugelbahn system expansion set Combined with a starter set, the extension of Trax can still be built. Still lane! The Trax extension lifts the ball lanes to a new level. Combined with a gravitrax starter - set, she creates even more ball track. Contents: 16 Hoehensteine large, 8 Hoehensteine small, 7 curves, 1 intersection, 1 plastic splint long, 2 plastic rails medium, 3 plastic rails short, 6 balls Danger. Halmed toy. Supervision by adults recommended. Danger. Small parts. Not suitable under 3 years.