Browse Items (56 total)

https://www.gathering4gardner.org/g4g14gift/ExchangeArchive-Knot-G14-005-1.jpg
Burr puzzle designed by Oskar van Deventer (used with permission). For G4G14, this 14-piece puzzle felt appropriate. Contrary to the name of the puzzle, these exchange puzzles are in fact rather small.

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https://www.gathering4gardner.org/g4g14gift/ExchangeArchive-Egg-G14-002-1.jpg
I have made a full-color, two-sided instruction sheet on how to draw the attached design on an egg, along with a laminated picture of one of my eggs that has adhesive on the back to become a sticker.

https://www.gathering4gardner.org/g4g14gift/ExchangeArchive-MartianMayor-G14-001-1.jpg
The Martian Mayor Problem looks at designing square modular networks which create Euclidean distances between modules. The catch is that there are a limited number of tunnels (connections) between modules. This is a mostly open problem as far as I…

ExchangeArchive-Tetradecahedra-G14-034-1.jpg
This Gift Exchange item will consist of four flat pre-cut polyethylene sheets that can be assembled to produce two truncated octahedra with connectors for interlocking into the space-filling arrangement of copies of this polyhedron. Multiple…

ExchangeArchive-14Bridge-G14-021-1.jpg
The puzzle is strongly related to the number 14.
The trick is based on a pythagorean triple.
The size of the puzzle is about 10cmx10cmx2.5cm, and it is made by MDF.
Goal: Put all bridges on the board.

ExchangeArchive-SierpinskiTetra-G14-012-4.jpg
A 3D-printed copy of the 5th-level (i.e., 1024 tetrahedrons) approximation of the Sierpinski Tetrahedron.
Please enjoy the beautiful shadows under sunshine.
In particular, this object has projections with positive measure and the shadow contains an…
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