Hilbert Curve Marble Run

A marble run in the shape of a Hilbert curve, a fractal that, step by step, fills a whole square. Each quarter of the run looks like the whole run: the mark of a fractal.

Nature uses the same trick to pack a lot of surface into a small space (brains, intestines).

Design by moebio on Printables, shared under CC0 1.0 (public domain). The files and photos are the designer's, unchanged.

1. Print with very low infill (3%). Use a 7 mm ball bearing as the marble.
2. Students draw the first three steps of the Hilbert curve on squared paper.
3. Find the smaller copies of the whole run in the model.