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In this physics activity, learners build a toy with a figure that spins around like a gymnast on the high bar.

In this activity, learners build their own construction cranes using tongue depressors and pushpins.

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 mechanical engineering activity, learners design shadow puppets with moving parts and use them to tell stories.