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    University of Washington
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    In this activity (4th activity on the page), learners test to see if saliva is necessary for food to have taste. Learners dry their tongues with clean paper towels and then taste samples of salt,...

    $1 - $5 per group Ages 8 - 18 5 to 10 minutes
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    Twin Cities Public Television
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    In this quick activity, learners will investigate what happens to bubble gum when it is chewed for 5-10 minutes. First, learners measure the weight of unwrapped pieces on a kitchen scale and...

    $1 - $5 per group Ages 8 - 14 10 to 30 minutes
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    COSI
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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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    American Chemical Society
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    In this activity on page 7 of the PDF, learners use iodine to identify foods that contain starch. Compare the starch content of a ripe banana, an overripe banana, milk, and flour mixed with water....

    $1 - $5 per student Ages 6 - 14 10 to 30 minutes
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    Science Museum of Minnesota
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    DNA is the thread of life. Encoded in its genetic sequence is the information that makes each of us unique. This activity allows you to see the long, stringy strands of your own DNA, extracted from...

    $5 - $10 per group Ages 8 - adult 10 to 30 minutes
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    Make
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    In this activity, learners extract DNA from their own cheek cells, then create a rudimentary DNA profile similar to those seen on crime scene dramas. This step by step guide includes instructions...

    Over $20 per group Ages 11 - adult 1 to 7 days
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    COSI
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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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    National Health Museum
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    In this simulation, learners act out each digestive function of the organs, tissues, and cells in the digestive tract. Two parallel strips of tape on the floor 3-4 feet apart and the width of the...

    $5 - $10 per group Ages 11 - 18 30 to 45 minutes