Instantly captivating, the award-winning ‘Engenius’ Marble Run has proven to be an instant success. A rewarding flat-pack puzzle to construct, it’s a joy to build then see in action. Powered by an electric motor, the marbles are raised to the top of two opposing runs: one a hypnotic spiral, the other a clitter-clatter zig-zag track... With balls continually circulating back and forth, the action is quite simply mesmerizing.