Another follow up to my original post about a 3D printed straw construction set, I've made a new shape of connector.  This new connector is shaped like a tetrahedral, it joins each straw at an angle of about 109.5 degrees to each other.  This shape is particularly interesting because it is commonly found in nature, most notably in molecules containing carbon.  In fact at the atomic level, diamonds (pure carbon) contain this same repeating tetrahedral configuration shown in figure 5.

I printed this connector with an epilog printer (the grand prize in the Make it Real Challenge!)  I've attached the AutoCAD and stl files below.
This is awesome!! The kids at the school I work for make things with straws for math and science, the teachers use pipe cleaners to hold them together, but as you can imagine that doesn't work the worlds greatest. These would be such the perfect solution! Nice job!
What a good idea!
awesome! you could make giant molecular models with this :D <br>if only I had a 3D printer, my life would be so much more awesome.

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Bio: I'm a grad student at the Center for Bits and Atoms at MIT Media Lab. Before that I worked at Instructables, writing code for ... More »
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