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In this activity, learners build their own sound machines and explore the interplay of motion and sound.

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

In this activity, learners consider how a simple machine, a lever, turns a small push or pull (a small force) into a larger--or stronger--push or pull (a larger force).

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