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Drinking Bird
http://www.teachersource.com/product/drinking-bird/energy
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http://www.amazon.com/Drinking-Bird-4975-The-Famous/dp/B000JSGLBK/ref=sr_1_1?ie=UTF8&qid=1385430421&sr=8-1&keywords=drinking+bird
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Joined over 8 years ago
Gainesville, Fl USA
My book, A BEGINNERS GUIDE TO 3D PRINTING: 14 SIMPLE TOY DESIGNS TO GET YOU STARTED is now available. If you want to design your own stuff, but thought it was too hard to learn, it isn't. Take a look. I've also written an app, "How To Make A Science...
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