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In this food science activity, learners observe different plant-originated foods.

1 cent - $1 per group Ages 8 - 14 30 to 45 minutes
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In this activity on page 7 of the PDF (Plants—The Green Machines), learners examine the effects that light and air have on green plants.

$1 - $5 per student Ages 6 - 11 1 to 4 weeks