everlab 1 Hour Circle Clock
I guess calling this a ‘clock’ is not exactly an accurate description because it really only works one hour at a time. Just stick it to a wall or place it on a large piece of paper and the arm will complete a full circle in exactly one hour. And as it sweeps around a large colored pencil at the end of the arm will slowly draw a perfect circle.
畫完一個圓形就剛好一小時… 有趣的設計！
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