I have ordered 2 of these sets and they are terrible. They crumbled and broke within minutes. They say they're fragile, but that's ridiculous. You are useless.
π¬ Revolutionary Filings Experiments by American Heritage Industries
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Magnetic Marble Diameter by Ajax Scientific: Unleash the Power of Attraction
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π§² Discover the Powerful Magnetic Attraction of Horseshoe Magnet Mm Chrome Style
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