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In this activity, learners are challenged to design and construct a windmill to harness the power of wind.

The goal of this activity is to design, build and test a house or toy for an animal.

Working in small teams, learners try to build a satellite that can float for at least five seconds in the marked area of a vertical wind tube.

In this activity, learners are challenged to design and build a system of gears and kinematics to create a hand-stamping machine.

In this activity, learners are challenged to design, build and test a birdhouse that will stay cool in the sun.

In this activity, learners test the pH of safe liquids available at home by creating a pH indicator from mashed blueberries.

In this game, learners take turns guessing toy animals from around their house based on the toy's characteristics.

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

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.

In this activity, learners engineer a paper helicopter that spins to the ground when dropped.

The goal of this activity is to design the fastest sailboat or one that carries the most treasure.

In this activity, learners are challenged to design and build the tools they need to survive being shipwrecked on a deserted island.