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In this activity, learners build a simple tabletop seesaw to test how different variables (the position of the fulcrum, distance, weight) affect its balance under increasing weight loads.

In this project, students explore how levers work, by making a puppet with moving limbs.

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 dynamic activity, learners build a catapult that launches projectiles, such as marshmallows.