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In this design challenge, learners use their creativity and imagination to design and test a wildlife crossing for their favorite animal.

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 activity, learners are challenged to build a bird feeder using recycled materials from home and are encouraged to problem solve during the extensions.

In this design challenge, learners will create their own roller coaster using household objects for the track and a marble or small ball as their cart.