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In this activity, learners plant seeds and watch them sprout and grow inside a CD case.

1 cent - $1 per student Ages 4 - 11 1 to 7 days
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This activity (on pages 13-18) has learners build a model tree and then figure out how to make their tree stand up by itself.

$1 - $5 per group Ages 8 - 14 1 to 2 hours
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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