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Magic Sand is children's play sand with hydrophobic properties, made from quartz sand as the base material modified by hydrophobic coating, with particle size 0.2–0.7mm, insoluble in water, shapeable in water, and restored to a loose state after drying.It with heavy metal content ≤10mg/kg, it is suitable for water play interaction and scientific experiments of children over 4 years old. Its unique hydrophobic performance allows children to intuitively feel physical properties, combining entertainment and popular science, and the sand particles can be reused repeatedly without caking and deterioration.