$2 vs $40,000 Notre Dame Marble Run

The creator spends 4 months building a Notre Dame marble run out of Gravitrax pieces, adding architectural details and lights. The marble run is synced to music and compared to smaller models like a Lego model and a foam puzzle. The video also features Notre Dame models of various sizes and challenges to turn them into marble runs.

A cute fold-out card model of Notre Dame from France is showcased. The model comes with an envelope for mailing, has instructions in French, and is challenging to fold. The creator explores the possibility of turning this card model into a marble run.

A foamboard model of Notre Dame that includes a book of Paris sights and food is introduced. The kit is more involved, requiring the use of double-sided tape for window decals. The creator turns the foamboard model into a marble run by rolling marbles in the rose window.

A 3D plastic puzzle of Notre Dame from Ravensburger is showcased. The puzzle, slightly larger than a Z scale used in model railroading, is assembled and turned into a marble run. The video mentions Ravensburger's sponsorship and the addition of custom 3D-printed pieces to the puzzle.

A detailed foam puzzle of Notre Dame is assembled, followed by the demonstration of a GraviTrax setup surrounding the model. The video showcases the interaction of marbles with triggers and additional 3D-printed pieces. The foam puzzle is described as being surrounded by scaffolding like the real cathedral.

A Lego MOC (My Own Creation) of Notre Dame at almost HO scale is presented. The intricate design by Stefano Mapelli of Stebrick.com is highlighted, featuring colorful windows and over 63,000 pieces. The video mentions the cost of $15,000 for genuine Lego bricks used in the model.

The process of prototyping and building a large-scale replica of Notre Dame using GraviTrax pieces is detailed. Challenges such as adapting the GraviTrax system to architectural features, addressing quirky details of Notre Dame, and constructing the cathedral's spires and windows are discussed. The video concludes with the final stages of building the Notre Dame replica.