Intro: Make an Icosahedron Out of Plastic Straws
Whether your looking for fun party or garden decorations, a way to lighten up your living/working spaces or a great way to teach geometry, this instructable will show the way!
Step 1: Gather Parts & Tools:
1/32" thick sheet of of plastic
20 Drinking Straws
Step 2: Cut Hubs
The attached dxf file can be used to lasercut the 12 hubs that are needed.
The hubs should be cut out of 1/32" thick plastic (PETG or equivalent).
You can also print out the pdf version on 8-1/2" x 11 paper to use as a template for cutting them out with scissors or with utility knife on a cutting mat. This is best done by temporarily mounting the paper on your sheet of plastic with a light coat of spray mount, then peeling the paper off along with the plastic sheet's protective layer after the cutting is completed.
Pre-cut hubs are also available on Etsy:
Step 3: Assemble
To assemble, using the photo as a frame of reference, carefully slide straws over the 12 hubs and interconnect each one until you have completed the 20 sides of the icosahedron!
Step 4: Hang (Optional)
Hang the icosahedron as you see fit. Fishing line and a barrel swivel are used in the attached video.