Master of Disguise

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cardboard,drawer,imposter,polls
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But The Width is PERFECT!

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air conditioner,cardboard,it-fits
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But everyone knows length is what matters.

~NSHA

What Do You Mean? Looks Like a Great Fix To Me!

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cardboard,cars,windows
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By Unknown
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Raise the Roof!

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air duct,cardboard,raise the roof,roof,ventilation
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At Least It Still Works If You're Colorblind

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cardboard,Professional At Work,tax dollars at work,traffic lights
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And this is why taxes are a good thing. ~Not-So-Handy Socialist Andy

The First A/C Prototype

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ac,air conditioner,cardboard,duct tape
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It's cool enough that it won't catch fire, right? ~Not-So-Handy Andy

Privacy and/or Cooling Fix

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cardboard,computer,laptop
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The submitter said it's used to help cool the laptop, but I have a feeling that this is doubles as a homemade privacy screen. ~Not-So-Handy Andy