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    Twin Cities Public Television
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    In this activity (located on page 2 of the PDF), learners will identify a group of deciduous trees to study. Once the species has been recorded, the circumference of the trunks will be measured at...

    1 cent - $1 per group Ages 8 - 14 1 to 2 hours
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    Twin Cities Public Television
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    In this engineering activity, learners examine bicycle mechanics and gear ratios. Learners determine which gears will help them bike a set course in the shortest amount of time.

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