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In this activity, learners build a miniature wind tunnel to measure force. Learners construct the model out of Lexan plastic, a fan, and a precise digital scale.

Over $20 per group Ages 11 - adult 2 to 4 hours
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In this activity (page 11 of the PDF), learners investigate how quickly water moves through various materials. They measure and compare the permeability of gravel, sand, and soil.

$10 - $20 per group Ages 11 - 14 45 to 60 minutes
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In this activity (on pages 6-11), learners work as a team to investigate how impact craters on Earth, the Moon or other planets take shape and what patterns they make.

$5 - $10 per group Ages 8 - 14 45 to 60 minutes
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Learners build a filter from old soda bottles and dirt. They create polluted water, and pour it through their filter to clean it.

$1 - $5 per group Ages 11 - 18 30 to 45 minutes