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In this activity, learners will build thier own balance scale. Learners will explore weight and comparison through this activity.

In this activity (26th on the page), learners construct an easy-to-build device and test motor learning.

In this activity, learners build a stuffed-animal zip line. Learners hold a cord against a wall, hook a cute stuffed animal onto it, let the animal slide down, and records its travel time.

In this physics activity (page 12 of the PDF), learners explore potential and kinetic energy by rolling different sized marbles down an inclined plane.