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In this hands-on activity, learners investigate the functional design of leaves on a tree.

This activity (on page 2 of the PDF under SciGirls Activity: Luge) is a full inquiry-based challenge related to motion and design optimization.

If you have lights, cardboard, scissors, and some brass fasteners, you can make shadow puppets! Create a story-telling and design challenge for your learners with this simple and creative activity.

In this activity learners will build a neighborhood out of blocks and cardboard.

In this activity learners will build roller coasters and test them using small balls or marbles.

In this design challenge activity, learners design and build a solar hot water heater. Their goal is to create a heater that yields the highest temperature change.

In this activity, learners explore how engineering has developed various means to remove impurities from water.

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

In this activity, learners will use a variety of household and/or natural objects to design a sculpture that balances from a single point.

In this twist on a classic design challenge, learners will try to stop a bouncy ball from bouncing as they explore how to control the fall of an object.

In this activity, learners construct a home-made journal with simple, everyday materials.

Learners use engineering design principles to construct and test a fully solar-powered car. Solar car kits usually include a photovoltaic cell and motor; some include a chassis as well.

In this design challenge activity, learners add headphones to a previously built instrument (see "Build a Band" activity) to make it easier to hear.

In this engineering activity, learners will get acquainted with the basics of wind energy and power production by fabricating and testing various blade designs for table-top windmills constructed from

In this design activity, learners create a vehicle that can transport a load, like a favorite toy or as a recycled object, from the top of a zipline to the bottom using only gravity.

In this activity, learners explore the engineering and principles behind working elevators.

In this design challenge activity, learners invent an emergency shelter that can fit a person and is sturdy and quick to build.

In this design challenge, learners will create their own roller coaster using household objects for the track and a marble or small ball as their cart.

This activity (on page 3 of the PDF under GPS: Sailboat Design Activity) is a full inquiry investigation into design optimization.

In this activity, learners use design thinking to design and build their own bridge out of household materials including adhesives and/or connectors.