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In this activity (on page 2 of PDF), learners create a low-tech refrigerator that requires no electricity to keep food from spoiling.

In this activity about human interface design issues, learners help the Oompa-Loompas of a great chocolate factory solve different problems.

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

In this activity, learners design a scientific exploration mission to a planet or moon of their choice.