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In this experiment, learners float colored ice cubes in hot and cold water.

1 cent - $1 per group Ages 11 - 18 45 to 60 minutes
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Learners grow sugar crystals (rock candy). They make a hot solution that has an excess of sugar dissolved in it, then as the solution cools, they see sugar crystals form.

$1 - $5 per student Ages 6 - 11 4 to 24 hours