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Mind-Blowing Toys

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For the architects, real estate brokers, and iPhone owners amongst us, do check out the Sonar Ruler. What it is: "Basically it uses the iPhone’s speaker to send out a short click sound and it then measures how long it takes for that sound to bounce off of something in the environment. It can be quite accurate to within an inch or so when used in the right situations." Whoaaaa. Yours for 99 cents! [labs@Iaan via Kottke]