Uploaded May 2012 | Updated September 2026, 2 weeks ago

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It's an interesting challenge to figure out how to make these objects. Patience and perseverance required! When you go up one step and add another 10 partial tetrahedra to the final shape with the same logic, you'll find that the entire shape is no longer totally solid, there will be a small empty tetrahedron in the center of the shape.