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    In this chemistry activity (page 5 of the PDF), learners will see that chewing is more than just the crushing up of food; there is actually a chemical change going on at the same time. This...

    1 cent - $1 per student Ages 6 - 11 5 to 10 minutes
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    In this biology activity (page 8 of the PDF), learners will explore how saliva assists in the beginning of the digestive process. By comparing chewed and unchewed crackers, they will see first hand...

    $1 - $5 per student Ages 8 - 14 10 to 30 minutes
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    In this chemistry activity (page 3 of the PDF), learners will observe a chemical change, specifically what happens to iodine when it is applied to ripe and unripe apples. From the reaction of...

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