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In this design challenge activity, learners build a tower that’s at least 12 inches high with two or more parts that move (spin, sway, or flap) in the wind.

In this activity, learners build a carousel toy that spins when pushed down.

In this activity, learners explore the properties of paper by constructing and modifying paper airplanes.

In this activity, learners build unique yo-yos, which spin round and round without moving up and down.

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

In this activity, learners build scaled-down structures and cantilevers in a series of "building out" challenges with bamboo skewers and tape.

In this activity (page 4), learners work in groups to plan and build large structures using recyclable materials they have brought from home.