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Future Feeder » Blog Archive » Knock Knock Calculator
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Knock Knock Calculator

May 22nd, 2013 | Filed under: Uncategorized | Tags: | No Comments »

Knock Knock is a clever Arduino-controlled calculator toy, designed for small children. The user knocks out a calculation on the surface — addition, multiplication, subtraction, or division — and Knock Knock will spit back the solution, in the form of knocks, of course.

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