Cuboro - Tunnel Extra Set

5 years and up

Hidden paths beneath the surface

With TUNNEL, you add excitement and depth to your marble run. The marbles disappear inside the run and roll invisibly through clever, winding tunnels until they suddenly reappear somewhere else.

This turns your marble run into a three-dimensional experience full of surprises. TUNNEL expands classic courses, connects levels and sharpens the sense for what lies beneath. The perfect set for all who love to discover what happens below the surface.

    16 elements
    5 balls
    Material: Swiss beech wood
    Age recommendation: from 5 years

Swiss Made

Cuboro TUNNEL


The highlights

    Discover invisible course layouts within the tunnel system
    Experience unexpected routes and clever connections
    Expands the system with new spatial dimensions

Learning through play

    Trains imagination and spatial thinking
    Encourages understanding of invisible processes
    Arouses curiosity for what happens out of sight



Naturally ingenious, beech wood

Our cubes come from the forest - more precisely: from sustainably managed Swiss beech forests. The wood is robust, durable and comes directly from the region.

Each cube remains untreated, completely natural - so you can still feel the characteristic feel of the wood. Because it not only looks good, but also shows responsibility, it bears the "Swiss wood" label.

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

Playing safely

CUBORO elements are robust, durable and naturally free from harmful substances - so they are safe for skin or mouth contact, even for people with allergies. To ensure that everything runs smoothly during play, each Element is carefully sanded - for clean edges and a safe, pleasant playing experience.

Our marbles also play it safe: they meet the highest safety standards in the industry. Nevertheless: small balls - big effect. Please keep out of reach of children under 3 years of age.