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$9.99
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Turn this liquid tumbler over and watch the colored droplets float down in a relaxing zig zag pattern. Water Marbles 2 Color Liquid Motion Timer is a great visualization aid to show how water and oil don't mix. It's full of zigzagging, liquid motion fun! Turn this desk toy over and watch the 2 colored liquid drops make their way down the zig-zag steps all the way to the bottom. Measures 3 x 6 inches. Two assorted colors.
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