Marble Run Marble Genius Extreme Set, How to Build Marble Run - “The Backcourt”

Marble Run Marble Genius, How to Build New Design - “The Backcourt.” Come and see how the original design “The Backcourt” is built with the Marble Genius set and be entertained by how the marbles run down. The building techniques can apply to any of the sets by Marble Genius, such as the Starter Set and Extreme Set.
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