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In this activity, learners explore the concept of valve operation and how engineers have adapted valves for use in mechanical heart valve design.

In this activity, learners design and build a Zoom-a-rang using everyday materials. Experiment with different materials and Zoom-a-rang designs to see how they fly.

In this activity, learners will explore how and why weight distribution works.

In this activity, learners make a small batch of biodiesel that will work in any diesel engine. Learners use an old juice bottle as a "reactor" vessel to chemically process vegetable oil into fuel.

In this activity, learners design and build their own parachute using household materials with the goal of landing their passenger safely on a target.

In this activity (pages 42-49), learners discover the methods and challenges of building nanoscale structures with macroscale equipment.