If you've been sitting around all week wondering how you could combine smoke, speakers, and a love of novel physics experiments into an excuse to tinker in your workshop this weekend, building a smoke-shooting vortex cannon should cover everything nicely.
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There's nothing like a clear blue sky in real life, but it doesn't create for the most interesting photos—Weblog MakeUseOf has a nice tutorial for easily creating clouds to spice up the skies.
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If you've wanted to learn origami but never got around to checking out any library books on the topic, the massive collection of origami tutorials at Origami Club can help get you started.
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Mac only: No longer must Mac users move to the keyboard to open links in a new tab—free, open-source app MiddleClick sits in your menu bar and allows you to use 3 fingers to middle click on Apple's multitouch devices.
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