The super-absorbent polymer found in disposable baby diapers.
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This is the super-absorbent polymer found in disposable baby diapers. Also used in many "disappearing water" magic tricks, this fine white powder instantly turns liquid water into a slush-like solid substance. Technically speaking, the polymer absorbs from 500 to 1,000 times its own weight in water. Simply add table salt to reverse the reaction. Safe and amazing -- your students will love it!