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In this activity about light and perception, learners create pictures in thin air.

In this three-part activity, learners use paper to explore Bernoulli's Principle — fast-moving air has lower pressure than non-moving air.

In this activity (pages 13-14), learners investigate the properties of smart materials, which are materials that respond to things that happen around them.

In this hands-on activity, learners use an assortment of (mainly household) items to complete Rube Goldberg-type challenges.

This fun activity uses simple materials such as milk cartons and mirrors to introduce the ideas of optics and visual perception.

In this two part activity, learners become draft detectives by constructing their own draft catchers to detect drafts around windows or doors.

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

In this activity, learners are challenged to design and construct a trophy for prize-winning sports equipment.

Learners create an Incan counting device called a quipu (pronounced kee-poo).

In this activity, learners imagine what the world might look like if we could build an elevator to space!

In this activity, learners will use Google Sky to observe features of the night sky and share their observations.

In this activity, learners consider how a simple machine, a lever, turns a small push or pull (a small force) into a larger--or stronger--push or pull (a larger force).