






Cuboro TUNNEL – Expansion set for creative marble runs






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Dive into the world of hidden marble runs!
The Cuboro TUNNEL expansion set opens up entirely new possibilities for your marble run. The 16 specially milled tunnel blocks guide the marble through invisible paths and allow it to reappear in surprising places. This set brings new dimensions to the game and promotes logical thinking and creativity in builders of all ages.
The Cuboro TUNNEL set is compatible with all other Cuboro marble run systems and allows for the creation of fascinating constructions on multiple levels. Crafted from natural Swiss beechwood , the set guarantees the highest quality, sustainability, and years of fun. It promotes spatial awareness and encourages creative tinkering and planning.
Durability and sustainability – the set is an ideal addition for all Cuboro fans and an educational wooden toy for children ages 7 and up.
- Building blocks: standardized cube shape with 5 x 5 x 5 cm
- Overall dimensions: can be individually designed depending on the construction
- Weight: approx. 2.5 kg (complete set)
The set is compact yet expandable. It fits on any gaming table and can be easily stored after use.
Manufactured in Switzerland with the highest precision
- Up to 30 work steps per element
- Gently ground, rounded edges for maximum safety
- Glass marbles made to Japanese quality standards, optimally matched to the track layout
This marble run set represents excellent craftsmanship where every detail counts. For parents who don't compromise.
- Promotes logical thinking and spatial imagination
- Supports fine motor skills and creative problem solving
- Ideal for Montessori-oriented learning
- Suitable for individual play or group activities (at home, daycare, school)
This marble run is more than just a toy – it is a tool for the holistic promotion of child development.

what is important to us
As a responsible husband, I know what parents want for their children: safety, fun, joy and quality. And it is precisely these properties that all of our products combine.

Individual pieces from the EU instead of mass-produced goods
Since our products are lovingly handcrafted, each piece is something very special. This also allows us to flexibly implement your individual wishes.

Educational valuable
Our products are designed according to the Montessori or Pikler philosophy and encourage your children in a playful way. The focus is primarily on gross motor skills.

Sustainable and ecological
We only use sustainable and ecological materials. These are all certified and do not harm our children or the environment.