Wednesday, 1 May 2013

Knock, Knock...


Created by Khalil Klouche, Knock Knock is a playful calculator designed for small children.


Knock out a calculation on the wooden box and it will knock back with the answer.


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1 comment:

  1. incredibusy9 May 2013 at 21:21

    oh crumbs... now my head is really muddled, I think I need to try that out! :)

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