# Browse Items (56 total)

- Collection: G4G14 Exchange Bag

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## Modular Space-Filling Tetradecahedra

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…

**Tags:**
Exchange Gift, G4G14, Studio Infinity

## Octaroller

BUILD your OCTAROLLER ! from 3 parts square.

RACE your OCTAROLLER ! down the ramp in a straight line.

CHEER your OCTAROLLER ! with supplied cheering pom pom on a toothpick.

Octaroller is included in Geometric Foundations of Design: Old and New…

RACE your OCTAROLLER ! down the ramp in a straight line.

CHEER your OCTAROLLER ! with supplied cheering pom pom on a toothpick.

Octaroller is included in Geometric Foundations of Design: Old and New…

**Tags:**
G4G14, Puzzle, Recreational Math

## Penrose P3

I am making paper flexagons with Penrose patterns on them to illustrate the patterns. My stuff touches three things from Martin Gardner, Flexagons, Penrose Tiles, and Polyominos (the classification system for tetraflexagons is based on these with a…

**Tags:**
Art, G4G14, Puzzle, Recreational Math

## Quadratic Formula Nomograph

This is a cute graphical computing device which finds the roots of a quadratic polynomial. Stretch the (included) string between two scales representing the coefficients of the polynomial, and it tells you the roots! This device is based on an…

**Tags:**
G4G14, Recreational Math

## Rep-Tile Tangram

The gift will be a number of cut-out pages to create a rep-tile tangram: A tangram shape that is made from tangram shapes, that are made from tangram shapes.

**Tags:**
G4G14, Puzzle, Recreational Math

## StarHex-14: Theo Geerinck's 14 Polystars

14 tiles consisting of hexagons with 0 to 6 equilateral triangles attached on their edges can be cut from card stock provided to solve the large collection of puzzle figures presented. Five colors, each tile shape is unique with one mirror pair.…

**Tags:**
G4G14, Puzzle, Recreational Math

## The 14 Two-Color Frieze Symmetries in Mosaic Knitting

Mosaic knitting, a relatively new form of two-color knitting, has become popular because it is easier for the knitter than most traditional forms of color work. The price of this ease is an unusual set of restrictions on color placement for the…

**Tags:**
Art, G4G14, Recreational Math

## The Accountant

Martin Gardner would sometimes wrap puzzles inside stories he concocted, such as with the book “The Numerology of Dr. Matrix.” The following puts my favorite puzzle in that tradition: The Accountant

by Barney Sperlin

by Barney Sperlin

**Tags:**
G4G14, Legacy, Recreational Math

## The Art of Destroying Flexagons

Destroying flexagons can be fun and artistic! We suggest 4 different ways to artistically destroy flexagons, each with its own merit. Our exchange gift is a set of 4 flexagons strips, one for each demonstration and the attached explanation sheet.

**Tags:**
G4G14, Puzzle, Recreational Math, Toy

## The Martian Mayor Problem

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…

**Tags:**
G4G14, Recreational Math

## Traveling Through the Sierpinski Carpet and Menger Sponge

An ant wants to travel from one corner of the Sierpinski carpet to the opposite corner using the shortest possible route. And his friend, a termite, wants to do the same in the Menger sponge. Can you guide them well?

**Tags:**
G4G14, Puzzle, Recreational Math