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In this activity, learners build inexpensive pulley assemblies from pulley wheels used for sliding screen door replacement or from clothesline spreaders.

In this activity, learners construct their own small catapults using simple materials. Learners follow visual instructions to build their launching device.

Get all wrapped up in a lesson about skin!

In this activity, learners make a simple spring-like scale using a rubber band instead of a spring, and calibrate the scale in newtons (N).

In this activity, learners simulate Otto von Guericke's famous Magdeburg Hemispheres experiment.