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In this tabletop activity (on pages 32-40), learners make Möbius strips -- 3D surfaces with only one side.

In this activity learners will build roller coasters and test them using small balls or marbles.

This activity (on pages 21-32 of PDF) has learners act out several classic brain teasers.

In this design challenge activity, learners explore the concept of biomimicry by using a natural organism's special features to design a new human object.