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Product Number: SB47058

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Grades K-12. Contains a super saturated solution of water and sodium acetate. Snapping the metal disc creates a chain reaction, causing the solution to crystallize. The crystallization process gives off heat. Packs can be recharged back to the liquid state by immersing in boiling water for 10-15 minutes and allow it to slowly cool. Includes teacher’s guide. 4 in. x 4 in.

Item Weight: 0.44
Age: Infant - 18 yrs.
Prop 65:
Brand: American Scientific
Assembly Required: false
Grade: Preschool - All Levels
School Type: All Levels
Subject Areas: Physical Science


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