Remember how cracking knuckles used to drive your family and friends up the wall? Well, you can take this a step further by getting hold of the quirky knuckle-cracking simulator from Strapya World. At about $5 (500 yen), the Yubi-Poki virtual knuckle cracker can produce the cracking sounds as frequently as you desire.

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Apart from being a collectible item, the device could be used as a practical joke to get people to crack up and have fun. The knuckle cracking simulator comes in three colors: white, red and black

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