Shelling corn is a chore done by hand in much of the rural developing world. Corn comes in different sizes - and the various DIY shellers are a major chore to make. Here you can either use the customizer app or the OpenSCAD to get the right size of sheller for your crop -- then print in plastic or metal.
This is an example of 3-D printable open source appropriate technology developed by Michigan Tech's Open Sustainability Technology Lab.
This academic paper explains how 3-D printing could be a powerful tool for pulling people out of poverty in the developing world.
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Remember to come back and post what you've printed as Make.
It's good for the designer and the community (that means you)!
To post a Make, come back to this Thing and click Post a Make.
Or, you can use the Thingiverse Mobile app found on
and the Apple App Store.