# Hot Math Craft Posts

### News: Math Craft Inspiration of the Week: Christmas Chaos

If you take two flat mirrors and place them front to back and look at them, you can see an infinite number of reflections. While this is a self-replicating pattern and can be somewhat mesmerizing, it isn't anywhere as interesting as looking at the chaotic scattering of light that can occur between 3 or 4 spheres.

### News: Best Math Class Project Ever

I wish there was more information about this impressively massive sonobe model, but all I can glean is that it appears to have been made by Imogen Warren, and was posted by Room 3. So awesome.

### News: Nice Range of Modular Models

A source of inspiration... Models folded and photographed by Michal Kosmulski. There are only two sets of instructions on the site, but they are very well done. I wish he had covered more of the models. Here are a few I would like to tackle (I'll admit my eyes are bigger than my plate):

### News: TUVWXYZ Star Model

So beautiful... I'm looking forward to tackling this one: Via David Petty:

### Math Craft Monday: Community Submissions (Plus How to Make a Magic Square Tetraflexagon)

It's Monday, which means once again, it's time to highlight some of the recent community submissions posted to the Math Craft corkboard. In this post, we'll also make a flexagon, which is a type of transformable object.

### News: A Compound of Two Cubes with a Minecraft theme

Compound of two cubes with a Minecraft theme.

### News: Orderly Tangle Earrings

I decided I would make those earrings I alluded to in Monday's Post on orderly tangles. I had to shrink the templates down so that the triangles are about 2 cm on a side. I used 110 lb cardstock and and painted them using metallic leafing paint in gold, silver, copper, and brass. I would put up a tutorial, except I think that this project would be too frustrating for most people. All I can suggest is that you make the orderly tangle of 4 triangles multiple times and just keep shrinking the si...

### News: Tom Friedman's Twisted Math Art

Tom Friedman is one of my favorite artists. He's got a great sense of humor, and his work is meticulous and beautiful. He forays into Math Art, and from a partisan perspective, he seems to be inspired by mathematics, but the end results are more of a whimsical twist than a mathematically "correct" execution. But I could be totally wrong. Comment below and fill me in.

### News: Math Craft Inspiration of the Week: Marble Binary Calculators & Other Mechanical Computers

Since today (11/11/11) is the last 6 digit binary date this century, I thought we should look at some kinetic binary calculators.

### News: Modular Origami

Cory has posted some great picture of Father Magnus' intersecting cubes (the great man is holding one in his right hand) - well the above is what happens when five tetrahedra intersect. It is modular origami and made from just ten sheets of origami paper. technically in a folding sense it is easy - but putting it together is mind-warping

### News: Curved Modular Octahedron

Each curved module replaces the equilateral triangle of a simple octahedron. Inspired and copied from Cory's post with original artwork by Richard Sweeney

### How To: Make Torus Knots from Soft Metals

Torus knots are beautiful knots formed by wrapping a line around a torus and tying the ends together to form a loop. The resulting knot has a star-like appearance when viewed from above. The 36 examples with the least number of crossings can be seen at the Knot Atlas's page on torus knots.

### News: Origami Valentine's Day Present

I made a Origami Valentine's day present for my Little Sister and Neice using heart and rose origami patterns I found on-line and put them in a backet with heart shaped lollipop I bought from Target.

### How To: Make a 'Flex Mex'—A Mathematically Delicious Hexaflexagon Burrito

Here's a great excuse to play with your food—and learn some math while you're at it. We've all seen a hexaflexagon folded out of paper, but how about a burrito? Vi Hart, a "mathmusician" over at the Khan Academy, came up with the Flex Mex, a burrito folded into a hexaflexagon with all the toppings inside. The spreadable ingredients (guacamole, sour cream and salsa) go inside the folds, then it's topped with beans and cheese.

### News: Sonobe modular Fun

Made some Sonobe modules with some note cards. I made a big one with poster paper...Paper magic

### How To: Design Your Own Playing Card Sculpture

Download the Software Go to the Antiprism downloads page. Download and install Antiprism 0.20.

### News: The Incredible Polyhedra Models of Mario Marín

Mario Marín has made an incredible collection of models and sculptures based on polyhedra, often using everyday and readily available items. The site is in Spanish, but click on the links on the left and there are plenty of photographs, and more can be seen in Mario's blog.

### News: Twisted Small Stellated Dodecahedron Tensegrity

This is a zigzag tensegrity based on a small stellated dodecahedron. There are string pentagons on the outside of the model where the vertices have opened. It is made of thirty units, consisting of a barbecue stick pair with a loop of elastic. The stick pairs are all "floating", and weave through the model without contacting any other stick pairs. It is quite tricky to assemble, but can be done entirely by hand.

### News: Platonic Solid Made from Rider Back Playing Cards

Below, my construction of a Platonic Solid made from playing cards. To make your own, templates can be found at George Hart's site; there are also full step-by-step instructions here.

### News: DIY Fractal Gingerbreadmen

After I made a blog and sent it to my friends about how I made Gingerbreadman Map fractal holiday cookies, one of them linked me back to the Sierpinski Carpet cookies, which I loved! So, I thought I'd share my how-to with everyone as well!

### News: Alexander Graham Bell's Tetrahedral Obsession

Oobject put together a neat compilation of the famous telephone inventor's love for tetrahedrons. Scroll down to see his collection of pyramids, building towers, buildings, boats, kites and planes—all made completely out of tiny tetrahedrons. Amazing.

### Silver & Gold: DIY Modular Origami Christmas Ornaments

After becoming addicted to basic sonobe modular origami, I decided to make ornaments for relatives as Christmas gifts. I tried using fancy paper from stores like Paper Source, and cutting it to proper origami size, but I could never get the tight folds I wanted with non-traditional, non-origami paper. I ended up using this metallic origami paper that folds beautifully, and I'm pretty happy with the tiny models I ended up with. Forgive these pictures (iPhone/Instagram), I don't have my regular...

### News: DIY Origami Christmas Tree

This is how my version of an origami Christmas tree turned out based on the instructions I posted awhile back. Cory also made a version from white glossy paper, which looks great. I opted for the green and brown look, but it wasn't easy.

### How To: Make Yin-Yang Modular Polyhedra

Last Thursday's post demonstrated how to Make Yin-Yang Pillow boxes, which were based on equilateral triangles and squares. The units for making these boxes were created by Phillip Chapman-Bell, who runs an amazing origami blog and has a spectacular flickr photostream. Using these units, you can make also make 4 of the 5 platonic solids. I made an additional template based on the regular pentagon so that the dodecahedron can be built completing the set.

### Math Craft Monday: Community Submissions (Plus How to Make Escheresque Tessellated Cubes)

It's once again Monday, which means it's time to highlight some of the most recent community submissions posted to the Math Craft corkboard. Since two of these posts were on polyhedral versions of M.C. Escher's tessellations, I thought we'd take a look at building a simple tessellated cube based off of imitations of his imagery.

### News: Polyhedron Animation

Below, polyhedron animation test #1. The model was folded using Cory Poole's modular origami tutorial.

### News: New Colour Scheme Pentakis Dodecahedron

So I really like the new colour scheme. This sonobe pentakis dodecahedron uses twelve colours; one for each face.

### News: Geodesic Gingerbread House

Came across this gingerbread house while browsing the web. Looks like you bake the gingerbread in hexagons and pentagons, and then "glue" them together with icing. Very cute!

### News: M.C. Escher Square Tessellation Ornaments

Imatfaal's awesome post on Escher's tessellations on Polyhedra reminded me of some ornaments I made this summer. I made some of Escher's square tessellations onto cubes and then reprojected them onto spheres. I actually used a 60 sided Deltoidal hexecontahedron since that net is fairly easy to fold and looks pretty round.

### News: Escher Tessellated Polyhedra

After Cory Poole posted some great Escher snowflakes, and Cerek Tunca had the great idea of using it as a base for a tetrahedron, well, I just had to give it a go. I will post a few more pictures and variants later (I think this was what Cerek was envisaging—if not let me know!)

### News: My Snowflakes.

Snow Angels:

### News: More Kirigami Snowflakes

I spent a little bit more time making 6 sided Kirigami Snowflakes using the method of this post. I'm really happy with how all of these turned out. I'd love to see other people post up some snowflakes. They're easy and a lot of fun. And I could use some more inspiration!

### News: My Origami Christmas Tree

Based off these instructions posted up by Justin Meyers of Scrabble World. I made it out of Glossy Photo Paper so it is really shiny.

### News: Bird's Eye Maple Veneered Papercraft Dodecahedron

I bought a sheet of ultra thin 1 ply Birdseye Maple veneer the other day and decided that It would look beautiful as a dodecahedron. I used some glue to attach it to cardstock and then cut it out as the net of a dodecahedron. I used a X-acto knife to lightly etch the fold lines on both the cardstock and the veneer so that it would fold crisply. I glued it all together using superglue. This post shows the net and how to fold it.

### News: Mathematical Origami Documentary: Between the Folds

Just watched PBS origami doc Between the Folds last night. If you haven't seen it, I highly recommend it. It's a beautiful film, really inspiring. Lots of Math Craft-related subject matter. Available instant on Netflix, or for rent on iTunes.

### Holiday Project: Origami Christmas Trees

Thanksgiving. It's sadly over. But happily replaced by the Christmas season!

### News: My Sonobe Jasmine Dodecahedron

Here's my Sonobe Jasmine Dodecahedron built from Imatfaal's instructions.

### News: Fractal Pecan Pie

Following the pattern of fractal goodies, I found this great article on making a giant fractal pecan pie. Seems like you'll need some dedicated pecan pie enthusiasts (shouldn't be hard to find) to help you out!

### News: Math Craft Inspiration of the Week: The Intricate Sonobe Art of Meenakshi Mukerji

Last week Math Craft admin Cory Poole demonstrated how to make three of the platonic solids from Sonobe units: the cube, the octahedron, and the icosohedron; but where was the dodecahedron? I was pushed to find out how to make a sonobe dodecahedron from this beautiful picture (below) that Rachel Mansur posted on the corkboard.