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Learners construct a rocket from a balloon propelled along a guide string.

In this design challenge activity, learners use two helium-filled balloons to build a blimp that can travel in a straight path across the room.

Investigate how force and thrust work to propel rockets into outer space. Build a rocket: a blown-up balloon taped to a drinking straw threaded through some string.

Build a car that runs on air. Using household materials, experiment with the power of air to create thrust powerful enough to move a homemade car.