Pen vibrates when the user makes a mistake

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The Bruynzeel My Grip pen may have been designed for kids by kids themselves, but it seems safe to say it lacks at least one feature that most schoolchildren would surely value. Imagine a pen that alerts the user as soon as they've made a mistake, and you've essentially got the Lernstift, a new innovation from an Austrian startup by the same name. Electronics integrated into the Lernstift enable the device to recognize a wide variety of writing movements and alert the writer by vibrating when a mistake has been made. Specifically, two functions are available on the pen: Calligraphy…

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