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In this activity, learners construct a device that allows them to view 2-D images in 3-D.

This activity is a hit for family events and all ages—some will finish in 45 minutes; others can go on for hours.

In this engineering activity (page 5 of PDF), young learners investigate how materials and design contribute to the strength of a structure, particularly walls.

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).