Gravitrax Expansion Tunnels (Asian Version)
The Tunnels Expansion Set adds stealth and surprise with 18 all-new elements.
Use the straight, curved and vertical tunnels to hide your marbles as they fly through your tracks. Test the new Bernoulli and o-tracks to see how much speed you can generate and where you can drop the marble to a level below.
- 10+ Modular Components
- STEM Engineering