Back in the early 90's curator Hans Ulrich Obrist created, Do It: The Compendium, where he invited thirteen international artists to render instructions in a step by step format where its readers could reinterpret, improve, and perhaps eventually become inspired to create other new and simple innovations. Among Obrist's thirteen handpicked artists, was none other than famously controversial Chinese artist, Ai Weiwei. Ai Weiwei illustrated a homemade gadget that extends a can of spray paint in order to make it easier to block out surveillance cameras.

The materials Ai Weiwei requires include a bike brake bar, a bike bottle cage, a pole, a spray bottle, a wine opener, and a screw. Not to mention, Weiwei generously provides step-by-step directions on how to put this bad boy together. But hey, if you're too busy with other things and you don't want to go through the trouble of building this device, you can buy it for $10 on Amazon.   

[via Designboom]

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