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In this engineering activity, learners investigate the differences between the strength of bridges made from flat and round building materials.

In this quick activity (page 1 of the PDF under SciGirls Activity: Tug O' War), learners will test how many pennies a flat paper index card bridging the gap between two stacks of books is able to supp

In this design challenge activity, learners invent an emergency shelter that can fit a person and is sturdy and quick to build.