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    In this ecology activity, learners make a model water-based ecosystem called a terraqua column. The column (in a large soda bottle) includes pond water, duckweed, sand or gravel, and small snails....

    Over $20 per group Ages 11 - 14 1 to 2 hours
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    In this two-part activity about the connection between the lupine plant and butterflies, learners first read "Miss Rumphius," a storybook about lupine by Barbara Cooney. Then learners...

    Over $20 per group Ages 8 - 11 45 to 60 minutes