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This three-part lab helps learners understand the essential principles governing diffusion and osmosis.

Over $20 per group Ages 14 - 18 4 to 24 hours
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In this chemistry activity (page 5 of the PDF), learners will use milk and a few other basic ingredients to create a chemical change to make a color wheel.

$10 - $20 per group Ages 8 - 14 10 to 30 minutes