TUNNEL - MARBLE RUN EX SET

With the CUBORO TUNNEL elements, marbles slip into hidden passages and race through invisible twists and turns, adding a whole new layer of mystery and excitement to any marble run. These clever pieces transform simple tracks into underground adventures, inviting children to experiment, predict, and discover what happens when the marble disappears from sight.

Extra Sets like TUNNEL expand the Starter Sets and open the door to even more creative building. As children explore how each element works, they naturally strengthen fine motor skills, deepen spatial imagination, and develop logical thinking. CUBORO encourages both independent play and group collaboration, making it a favorite in homes, classrooms, kindergartens, and team settings.

Designed for ages 7 and up, this Swiss‑made set includes 16 wooden elements and 5 marbles. Each cube measures 1.96 inches (5 cm) and is crafted from FSC‑certified beech wood. 

TUNNEL adds a sense of wonder to every build, turning marble runs into imaginative journeys that challenge and delight builders of all ages.