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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.

This activity explores the basic workings of a siphon, which is the core technology that makes toilets work.

In this activity, learners create a "Jam Jar Jet" based on Francois Reynst's discovery of a pulsejet engine, which uses one opening for both air intake and exhaust.