Cuboro - Tunnel Extra Set

Ages 5+

Secret paths beneath the Surface

With TUNNEL, you add excitement and depth to your marble run. Marbles disappear inside the track and roll invisibly through sophisticated, winding tunnels until they suddenly reappear at another location.

This makes your track a three-dimensional experience with a surprise effect. TUNNEL expands classic tracks, connects levels, and sharpens the eye for what is hidden. A kit for anyone who loves to discover what lies beneath the Surface.

16 elements
5 marbles
Material: Swiss beech wood
Recommended for ages 5 and up

Swiss Made

Cuboro TUNNEL

Highlights

Discover invisible paths in the tunnel system
Discover unexpected paths and sophisticated connections
Extends the system into new spatial dimensions

Learning through play

Trains imagination and spatial thinking
Promotes understanding of invisible processes
Awakens curiosity about what happens in secret



Naturally brilliant, beech wood

Our Cubes come from the forest - specifically from sustainably managed Swiss beech forests. The wood is robust, durable, and comes directly from the region.

Each Cube remains untreated, entirely natural - thus preserving the characteristic feel of the wood. Because it is not only beautiful but also responsible, it bears the "Swiss wood" label.

True sustainability from nature - a raw material that grows with you, like the joy of playing.

Safe play

CUBORO are robust, durable and naturally free from harmful substances - therefore harmless in case of skin or mouth contact, even for people with allergies. To ensure everything goes smoothly during play, each Element is carefully sanded - for clean edges and a safe and pleasant playing feel.

Our marbles also roll safely: they meet the highest safety standards in the industry. But the rule remains the same: small marbles - big effects. For children under 3 years old, please keep them out of reach.