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In this activity, learners explore how watermills have helped harness energy from water through the ages.

In this physics activity (page 10 of the PDF), learners will explore how energy from moving water can be used.

In this design challenge activity follow up to "Kicking Machine", learners add a hands-free feature to their Kicking Machine.

In this design challenge activity, learners build a machine out of cardboard that runs smoothly and dependably. Learners must be precise to make sure their component works properly.

In this activity, learners explore the engineering and principles behind working elevators.