Browse Items (14 total)

ExchangeArchive-Lucky-G13-024-1.jpg
A dissection puzzle involving the characters G413. Exact puzzle to be determined...

ExchangeArchive-CardDice-G13-082-1.jpg
This pair of unique dice consists of a 13-sided die with both numbers and face-card labels for J, Q, K, and A, along with a 4-sided die with the standard playing card suits.

ExchangeArchive-Spiram-G13-015-1.jpg
Physical physics toy gift for the exchange: A craft kit with all parts needed to crate a tiny kinetic sculpture based on the physics of equilibrium, magnetic force, and angular momentum.

ExchangeArchive-Surprise-G13-079-1.jpg
A small booklet of 20 math puzzles that involve the element of surprise. Some appear to lack sufficient information to solve; others run counter to one's intuition as to what the answer should be.

ExchangeArchive-4x13-G13-020-1.jpg
There are 52 cards in a standard deck of playing cards: four suits of 13 cards each. To design a deck of cards, one needs to establish the four suits, each with its own symbol and/or concept, and find a logic for generating the 13 cards in each suit,…

G4G-ExchangeArchive-G4G13-GoldenMagic-(1).jpg
Unofficial logo designed for G4G13

ExchangeArchive-PonyRubiks-G13-069-1.jpg
My Little Pony, 2x2, Rubiks Cube

ExchangeArchive-Lights&Spheres-G13-050-1.jpg
A 7cm green plastic sphere with a surface of conical projections, otherwise known as a Cando Massage Ball.

Titanium LED keychain flashlights: I will ship 200 with white LED, 100 with red, blue and green LEDs. Each attendee will receive one light…

ExchangeArchive-Cavalieri-G13-048-1.jpg
Just as 13 breaks up nicely as the sum of 8 and 5, so too does the (volume of a) cylinder break up nicely as the sum of a cone and hemisphere, a fact we have seen demonstrated at previous Gatherings in vivid ways. But the one-diagram proof of this…

ExchangeArchive-PatternStacker-G13-064-1.jpg
An abstract spatial thinking pattern puzzle

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-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-Pencil-G14-037-1.jpg
This novelty pencil includes the alphabet, numbers 1-26, and other curiosities that might be useful when working through puzzles or creating and cracking codes.

ExchangeArchive-Pentagons-G13-031-1.jpg
This item for the Gift Exchange is a 3D printed baker's dozen of irregular pentagons that tessellate the plane.
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