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In this activity, learners explore scale by using building cubes to see how changing the length, width, and height of a three-dimensional object affects its surface area and its volume.

Learners investigate weight by building a spring scale. They observe and record how it responds to objects with different masses.

Learners make their own simple slide rules out of paper and learn how they work.

Learners build simple catapults and use them to launch cotton balls.

Learners construct and launch paper helicopters.