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Item #: DEN-440
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Rated 3.7 out of 5, based on 3 reviews. Write a Review
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When inverted, three different colored sands flow through a clear liquid, starting and stopping as they encounter a hole or a barrier. It is fascinating to watch the eddy currents form by the flowing sand in a moving liquid! If one looks carefully, one even can observe upward motion of fluid, as everything else seems to be flowing downward. Colors may vary (14 x 20 cm)

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