Cuboro Extension Set - Tunnel Marble Run

Discover the mesmerizing world of hidden pathways with the CUBORO TUNNEL Extra Set! This premium expansion features 16 meticulously crafted beechwood cubes with ingenious internal channels that let marbles vanish and reappear as they navigate secret passages. Each 5cm cube is precision-engineered in Switzerland, creating an enchanting addition to your CUBORO marble run system. The TUNNEL set transforms ordinary marble runs into mysterious adventures as steel marbles disappear into the blocks, following concealed twists and turns before dramatically emerging. This 16-piece set includes 5 marbles and introduces an exciting dimension of surprise and discovery to any CUBORO Starter Set. Perfect for ages 7 and up, it challenges spatial thinking and encourages players to visualize and predict unseen pathways. Made in Switzerland Includes: 16 Elements and 5 Marbles Ages 7+ Cuboro is the epitome of Swiss precision engineering transformed into an endlessly engaging marble run system. Each met