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In this activity, learners create an electrical circuit and investigate how some dissolved substances conduct electricity.

Cool off in the heat with this project! Learners use simple materials to build a fan that runs on a motor.

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

In this activity, learners explore how engineers incorporate biometric technologies into products as well as the challenges of engineers who must weigh privacy, security and other issues when designin