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In this design challenge activity, learners use tubes of newspaper to make a table that’s at least eight inches tall and strong enough to hold a heavy book!

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.

In this activity (on pages 16-21), learners get a sense of geological time by understanding how big a million is.

This activity (on pages 19-24) introduces learners to the rain forest's layers—emergent, canopy, understory, and forest floor—and has learners make paper lianas (vines that live attached to trees) and