Make an Icosahedron Out of Plastic Straws

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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!

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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:

https://www.etsy.com/listing/266479491/hub-kit-for-making-an-icosahedron-out-of?ref=listings_manager_grid

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.

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    2 Discussions

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    wold630

    3 years ago

    The shadow is so cool! Reminds me of a spirograph!