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In this activity, learners create a model of a hot air balloon using tissue paper and a hairdryer. Educators can use this activity to introduce learners to density and its role in why things float.

In this activity, learners explore how engineers design devices that can detect the presence of pollutants in the air.

Scientists use enormous wind tunnels to test the design of planes, helicopters, even the Space Shuttle.

In this activity, learners evaluate the potential performance of air rockets placed inside a wind tunnel.

Students design and build their own parachutes in this hands-on engineering project.

This lesson challenges groups of learners to design and construct a wind generator with the most electrical output.

In this activity, learners make a barometer, an instrument to measure change in air pressure.

After a discussion about what a parachute is and how it works, learners create parachutes using different materials that they think will work best.

In this engineering/design activity, learners make a kite, fly it, and then work to improve the design. Learners explore how their kite design variations affect flight.

In this activity, learners explore how parachutes are used to slow down moving objects. Learners work in teams of "engineers" to design and build their own parachutes out of everyday items.

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.

This activity (on page 2 of the PDF under SciGirls Activity: Hovercraft) is a full inquiry investigation into hovercraft engineering and design optimization.

In this activity, learners build a miniature wind tunnel to measure force. Learners construct the model out of Lexan plastic, a fan, and a precise digital scale.

In this activity, learners explore rocketry and the principals of space flight.