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In this activity, learners are challenged to design and construct a windmill to harness the power of wind.

The goal of this activity is to build a miniature bobsled that is either the fastest or the slowest. Learners use recycled materials to design, build, and test their bobsled on a bobsled track.

The goal of this activity is to design the fastest sailboat or one that carries the most treasure.

In this activity, learners are challenged to design, build and test a birdhouse that will stay cool in the sun.